Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)		12 Months Ended
	Apr. 20, 2017 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) bank $ / shares shares	Dec. 31, 2016 USD ($) shares
Organization Consolidation and Presentation of Financial Statements [Line Items]
Assets, current		$ 24,159,000	$ 32,896,000
Liabilities, current		21,855,000	32,110,000
Retained earnings (accumulated deficit)		$ (117,088,000)	(102,764,000)
Number of commercial banks requiring cash collateral | bank		1
Period of payments collection from large financial institutions		30 days
Subscription period		1 year
Insurance premiums		$ 340,000	360,000
Goodwill		$ 9,763,000	$ 9,763,000
Expected dividend yield of options granted		0.00%	0.00%
Expected volatility of options granted		50.00%	45.00%
Risk-free interest rate of options granted		1.80%	1.10%
Expected term of options granted		4 years 7 months 6 days	4 years 9 months 18 days
Tax benefits recognized, percent		50.00%
Measurement period for historical data		3 years
Purchase of treasury stock (in shares) | shares	419,000	419,000	0
Average cost per share (in dollars per share) | $ / shares	$ 3.60	$ 3.60
Payments for repurchase of common stock	$ 1,500,000	$ 1,511,000	$ 0
Increase in treasury shares (in shares) | shares		103,000	76,000
Software
Organization Consolidation and Presentation of Financial Statements [Line Items]
Property and equipment, estimated life		3 years
Insurance And Other Consumer Services
Organization Consolidation and Presentation of Financial Statements [Line Items]
Goodwill		$ 347,000	$ 347,000
Personal Information Services
Organization Consolidation and Presentation of Financial Statements [Line Items]
Goodwill		$ 9,416,000	$ 9,416,000
Treasury Stock
Organization Consolidation and Presentation of Financial Statements [Line Items]
Purchase of treasury stock (in shares) | shares			0
Performance Shares
Organization Consolidation and Presentation of Financial Statements [Line Items]
Granted, Number of RSUs (in shares) | shares		0
New Credit Agreement
Organization Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument, face amount	$ 20,000,000.0
Minimum
Organization Consolidation and Presentation of Financial Statements [Line Items]
Subscription price per month		$ 4.99
Intangible assets, estimated useful lives		2 years
Property and equipment, estimated life		3 years
Maximum
Organization Consolidation and Presentation of Financial Statements [Line Items]
Subscription price per month		$ 25.00
Intangible assets, estimated useful lives		10 years
Advertising benefit expected to received in period		12 months
Property and equipment, estimated life		5 years
Subscription Revenue Recognition
Organization Consolidation and Presentation of Financial Statements [Line Items]
Assets, current		$ 1,500,000
Liabilities, current		2,900,000
Retained earnings (accumulated deficit)		$ (1,400,000)