View Filing Data

Less: accumulated depreciation and amortization

^[1]

$ 28,015

$ 28,083

^[1]

(25,094)

(25,678)

Property and equipment, net

^[1]

2,921

2,405

Computer and Other Related Equipment

Purchased and Internally Developed Software

^[1]

18,839

19,157

^[1]

6,878

6,687

Furniture and Fixtures

^[1]

1,023

1,071

Leasehold Improvements

^[1]

$ 1,275

$ 1,168

[1]	Includes the original cost and accumulated depreciation of fully-depreciated fixed assets which were $21.7 million and $23.5 million at December 31, 2017 and 2018, respectively.

Property and Equipment (Parenthetical) (Detail) - USD ($)
$ in Thousands

Dec. 31, 2018

Dec. 31, 2017

Accumulated depreciation and amortization

^[1]

$ 28,015

$ 28,083

^[1]

25,094

25,678

Fully Depreciated Fixed Assets

Accumulated depreciation and amortization

23,500

21,700

$ 23,500

$ 21,700

[1]	Includes the original cost and accumulated depreciation of fully-depreciated fixed assets which were $21.7 million and $23.5 million at December 31, 2017 and 2018, respectively.

Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Depreciation and amortization expense	$ 1.5	$ 2.8

Future Minimum Payments (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Contractual Obligation Fiscal Year Maturity Schedule [Abstract]
Facilities operating leases 2019	$ 1,569
Facilities operating leases 2020	1,613
Facilities operating leases 2021	1,643
Facilities operating leases 2022	1,613
Facilities operating leases 2023 and after	3,804
Facilities operating leases Total minimum payments	10,242
Other contractual obligations 2019	3,524
Other contractual obligations 2020	425
Other contractual obligations 2021	248
Other contractual obligations 2022	4
Other contractual obligations 2023and after	0
Other contractual obligations, Total minimum payments	4,201
Total 2019	5,093
Total 2020	2,038
Total 2021	1,891
Total 2022	1,617
Total 2023 and after	3,804
Total minimum payments	$ 14,443

Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Nov. 30, 2018
Commitments And Contingencies [Line Items]
Amended lease period	84 months
Payments for lease termination fee	$ 671,000
Lease expiration date	Mar. 31, 2025
Contribution as credit against lease payments	$ 180,000
Letter of credit amount payable		$ 575,000
Reduction in letters of credit		100,000
Rent expense		1,500,000	$ 2,000,000
Long term commitment amount		14,443,000
Strategic Technology \| Scenario, Forecast
Commitments And Contingencies [Line Items]
Long term commitment amount				$ 2,500,000
Telmetrics Acquisition
Commitments And Contingencies [Line Items]
Maximum contingent consideration cash payable on acquisition					$ 3,000,000
Fair value of contingent consideration					$ 1,500,000
Letter of Credit \| Certificates of Deposit \| Other Assets
Commitments And Contingencies [Line Items]
Letters of credit outstanding amount		$ 575,000

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2016
Income Tax [Line Items]
U.S. federal income tax rates	21.00%	34.00%
Deferred tax balances, net	$ 14,600	$ 14,413
Unrecognized Tax Benefits	1,158	1,122	$ 3,700	$ 1,070
Valuation allowance	35,057	32,668
Change in the valuation allowance	2,400	(12,100)
Federal
Income Tax [Line Items]
Net operating loss carryforwards	79,600
Federal \| Earliest Tax Year
Income Tax [Line Items]
Net operating loss carryforwards	1,700	$ 1,700
Research and Development Tax Credit
Income Tax [Line Items]
Net operating loss carryforwards	5,000
State and City
Income Tax [Line Items]
Net operating loss carryforwards	$ 6,400
Net operating loss carryforwards expiration year	2025

Loss from Operations Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
United States	$ (2,312)	$ (6,022)
Foreign	(522)	(23)
Loss before provision for income taxes	$ (2,834)	$ (6,045)

Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current federal provision
Federal	$ (48)
State	30	$ 42
Deferred provision (benefit)
Foreign	(138)
Total income tax expense (benefit)	$ (156)	$ 42

Computation of Income Tax Expense from Operations Using Federal Statutory Rate (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2018

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income tax benefit at U.S. statutory rate

$ (595)

$ (2,055)

State taxes, net of valuation allowance

Stock-based compensation

^[1]

378

2,396

Impact of 2017 Tax Act

14,600

14,413

Valuation allowance

(83)

(14,638)

Research tax credits

(13)

(156)

Other expenses

133

Total income tax expense (benefit)

$ (156)

$ 42

[1]	Includes non-deductible stock-based compensation and excess tax benefits and shortfalls from stock-based compensation.

Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Accrued liabilities not currently deductible	$ 612	$ 721
Intangible assets-excess of financial statement over tax amortization	873	939
Goodwill recognized on financial statements in excess of tax amortization	2,494	3,750
Stock-based compensation	1,894	1,680
Federal net operating losses	17,639	15,887
State, local and foreign net operating loss carryforwards	6,395	5,403
Research & experimental tax and other credit carryforwards	3,888	3,832
Other	1,320	456
Gross deferred tax assets	35,115	32,668
Valuation allowance	(35,057)	(32,668)
Net deferred tax assets	58	$ 0
Deferred tax liabilities:
Intangible assets-excess of tax over financial statement amortization	(1,589)
Net deferred tax liabilities	$ (1,531)

Summary of Activity Related to Tax Contingencies Recorded As an Offset to Deferred Tax Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Gross tax contingencies, beginning balance	$ 1,122	$ 1,070
Gross increases to tax positions associated with prior periods	0	0
Gross increases to current period tax positions	36	52
Gross decreases to tax positions associated with prior periods	0	0
Settlements	0	0
Lapse of statute of limitations	0	0
Gross tax contingencies, ending balance	$ 1,158	$ 1,122

Stockholders Equity - Additional Information (Detail)	1 Months Ended	12 Months Ended
Stockholders Equity - Additional Information (Detail)	Nov. 30, 2018 USD ($) shares	Dec. 31, 2018 USD ($) Vote $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Jan. 01, 2019 shares	Jan. 01, 2018 shares	Jan. 01, 2017 shares	Nov. 30, 2014 shares
Shareholders Equity And Share Based Payments [Line Items]
Preferred stock, shares authorized		1,000,000
Common stock, shares authorized		137,500,000	137,500,000
Preferred stock, par value \| $ / shares		$ 0.01
Treasury stock acquired, value \| $		$ 5,673,000
Cash dividends declared per share \| $ / shares			$ 0.50
Dividends payable \| $			$ 21,900,000
Dividend paid in cash \| $		$ 21,911,000
Options granted with exercise prices less than current market value, Shares		0	0
Income tax benefit related to stock-based compensation included in net loss \| $		$ 0	$ 0
Unrecognized stock option compensation not yet recognized \| $		2,000,000
Proceed from exercise of stock option \| $		89,000	89,000
Stock-based compensation expense \| $		$ 3,040,000	$ 4,597,000
Stock purchased by eligible employee			16,175
Maximum
Shareholders Equity And Share Based Payments [Line Items]
Stock purchased by eligible employee, price per share \| $ / shares			$ 2.91
Minimum
Shareholders Equity And Share Based Payments [Line Items]
Stock purchased by eligible employee, price per share \| $ / shares			$ 2.52
Equity Option
Shareholders Equity And Share Based Payments [Line Items]
Unrecognized compensation cost, weighted average recognition period		2 years 7 months 6 days
Restricted Stock
Shareholders Equity And Share Based Payments [Line Items]
Unrecognized compensation cost, weighted average recognition period		2 years 1 month 6 days
Unrecognized compensation expense \| $		$ 3,000,000
Granted, Shares		445,000
Stock Incentive Plan 2012
Shareholders Equity And Share Based Payments [Line Items]
Stock incentive plan, annual increase as a percentage of outstanding common stock		5.00%
Stock incentive plan, options term		10 years
Stock incentive plan, options annual vesting percentage		25.00%
Stock incentive plan, vesting period		4 years
Stock Incentive Plan 2012 \| Maximum
Shareholders Equity And Share Based Payments [Line Items]
Stock incentive plan, shares authorized						17,945,220
Stock Incentive Plan 2012 \| Minimum
Shareholders Equity And Share Based Payments [Line Items]
Stock incentive plan, shares authorized				2,101,062	2,189,624
Stock Incentive Plan 2012 \| Equity Option \| Maximum
Shareholders Equity And Share Based Payments [Line Items]
Stock incentive plan, shares authorized		3,500,000
Stock Incentive Plan 2012 \| Restricted Stock Units
Shareholders Equity And Share Based Payments [Line Items]
Stock incentive plan, options annual vesting percentage		25.00%
Stock incentive plan, vesting period		4 years
Employee Stock Purchase Plan Twenty Fourteen
Shareholders Equity And Share Based Payments [Line Items]
Stock incentive plan, shares authorized		225,000
Percentage of compensation eligible for purchase of stock		15.00%
Maximum value of stock employee is permitted to purchase in any calendar year \| $		$ 25,000
Stock purchased by eligible employee		9,906
Employee Stock Purchase Plan Twenty Fourteen \| Maximum
Shareholders Equity And Share Based Payments [Line Items]
Stock purchased by eligible employee, price per share \| $ / shares		$ 3.07
Employee Stock Purchase Plan Twenty Fourteen \| Minimum
Shareholders Equity And Share Based Payments [Line Items]
Stock purchased by eligible employee, price per share \| $ / shares		$ 2.58
Callcap Acquisition
Shareholders Equity And Share Based Payments [Line Items]
Business acquisition, percentage of voting interests acquired	100.00%
Cash paid for business acquisition \| $	$ 24,993,000
Class B
Shareholders Equity And Share Based Payments [Line Items]
Common stock, shares authorized		125,000,000	125,000,000
Votes per share \| Vote		1
Number of shares authorized to be repurchased							3,000,000
Treasury stock acquired, shares			239,000
Treasury stock acquired, value \| $			$ 2,000,000,000
Treasury stock, shares retired			239,000
Class B \| Stock Incentive Plan 2012 \| Maximum
Shareholders Equity And Share Based Payments [Line Items]
Stock incentive plan, shares authorized		2,000,000
Class B \| Employee Stock Purchase Plan Twenty Fourteen
Shareholders Equity And Share Based Payments [Line Items]
Common stock purchase price as a percentage of fair value		95.00%
Class B \| Callcap Acquisition
Shareholders Equity And Share Based Payments [Line Items]
Stock issued during the period, shares	3,400,000
Common stock issuance period	4 years
Class B \| Former Member Of Board Of Directors Member
Shareholders Equity And Share Based Payments [Line Items]
Treasury stock acquired, shares		2,300,000
Treasury stock acquired, value \| $		$ 5,700,000
Class A
Shareholders Equity And Share Based Payments [Line Items]
Common stock, shares authorized		12,500,000	12,500,000
Votes per share \| Vote		25

Stock-based Compensation Expense by Operating Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 3,040	$ 4,597
Service Costs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	435	515
Sales and Marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	563	1,014
Product Development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	356	679
General and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 1,686	$ 2,389

Assumptions to Estimate Fair Value for Stock Options at Grant Date (Detail) - Time Vested Stock Options	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	2.54%	1.68%
Risk-free interest rate, maximum	2.93%	2.09%
Expected volatility, minimum	41.00%	54.00%
Expected volatility, maximum	53.00%	56.00%
Weighted average expected volatility	49.00%	56.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	4 years	4 years
Expected dividend yield	0.00%	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	6 years 3 months	6 years 3 months
Expected dividend yield	3.70%	3.91%

Summary of Stock Option, Restricted Stock Award, and Restricted Stock Unit Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options and restricted stock available for grant, Beginning Balance	7,762,000
Options and restricted stock available for grant, increase to pool		2,190,000
Options granted	(897,000)
Options exercised	33,000
Options expired	730,000
Options forfeited	336,000
Options and restricted stock available for grant, Ending Balance	10,078,000	7,762,000
Options exercisable at December 31, 2018	3,777,000
Number of shares, Beginning Balance	5,713,000
Options granted, Shares	897,000
Options exercised, Shares	(33,000)
Options expired, Shares	(730,000)
Options forfeited, Shares	(336,000)
Number of shares, Ending Balance	5,511,000	5,713,000
Weighted average exercise price, Beginning Balance	$ 5.33
Options granted, Weighted average exercise price	2.83
Options exercised, Weighted average exercise price	2.65
Options expired, Weighted average exercise price	6.03
Options forfeited, Weighted average exercise price	3.20
Weighted average exercise price, Ending Balance	4.98	$ 5.33
Options exercisable at December 31, 2018	$ 5.90
Weighted average remaining contractual term, End of the period	5 years 6 months 10 days	5 years 11 months 4 days
Weighted Average Remaining Contractual Term, Options exercisable at December 31, 2016	4 years 25 days
Aggregate intrinsic value, Outstanding Ending Balance	$ 24	$ 604
Aggregate intrinsic value, Options exercisable at December 31, 2016	$ 9
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	(445,000)
Restricted stock forfeited	402,000

Stock Compensation Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of options granted	$ 1.20	$ 1.29
Intrinsic value of options exercised (in thousands)	$ 14	$ 11
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total grant date fair value of restricted stock vested (in thousands)	$ 2,845	$ 3,686

Summary Restricted Stock Awards and Restricted Stock Units Activity (Detail) - Restricted Stock	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested Shares, Beginning Balance \| shares	1,871,000
Granted, Shares \| shares	445,000
Vested, Shares \| shares	(650,000)
Forfeited, Shares \| shares	(402,000)
Unvested Shares, Ending Balance \| shares	1,264,000
Weighted average grant date fair value, Beginning Balance \| $ / shares	$ 3.25
Granted, Weighted average grant date fair value \| $ / shares	2.82
Vested, Weighted average grant date fair value \| $ / shares	4.37
Forfeited, Weighted average grant date fair value \| $ / shares	3.34
Weighted average grant date fair value, Ending Balance \| $ / shares	$ 3.28

401(k) Savings Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Postemployment Benefits [Abstract]
Cash Contributions	$ 189,000	$ 253,000

Segment Reporting and Geographic Information - Additional Information (Detail) - Segment	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting [Abstract]
Number of operating segment	1	1

Revenues by Geographic Region (Detail) - Geographic Concentration Risk - Consolidated Revenue

12 Months Ended

Dec. 31, 2018

Dec. 31, 2017

100.00%

United States

99.00%

96.00%

Canada

1.00%

4.00%

Other Countries