Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Revenue $ 182,644 $ 152,550 $ 132,794
Expenses:      
Service costs 114,581 [1] 91,858 [1] 75,920 [1]
Sales and marketing 12,251 [1] 11,182 [1] 13,057 [1]
Product development 29,561 27,346 23,200
General and administrative 20,923 [1] 19,385 [1] 22,838 [1]
Amortization of intangible assets from acquisitions 434 [2] 2,926 [2] 4,728 [2]
Acquisition and separation related costs (68) 878 753
Total operating expenses 177,682 153,575 140,496
Impairment of goodwill     (15,837)
Gain on sales and disposals of intangible assets, net   3,774 6,296
Income (loss) from operations 4,962 2,749 (17,243)
Other income (expense):      
Interest income 2 15 14
Interest and line of credit expense (76) (76) (438)
Other, net 12 24 (25)
Total other income (expense) (62) (37) (449)
Income (loss) before provision for income taxes 4,900 2,712 (17,692)
Income tax expense 24,277 1,755 16,566
Net income (loss) from continuing operations (19,377) 957 (34,258)
Discontinued operations:      
Income (loss) from discontinued operations, net of tax 9 (70) (938)
Gain on sale of discontinued operations, net of tax 278 930  
Discontinued operations, net of tax 287 860 (938)
Net income (loss) (19,090) 1,817 (35,196)
Dividends paid to participating securities (127)   (657)
Net income (loss) applicable to common stockholders (19,217) 1,817 (35,853)
Basic and diluted net income (loss) per share applicable to common stockholders:      
Dividends paid per share $ 0.08   $ 0.25
Class A      
Other income (expense):      
Net income (loss) from continuing operations (2,852) 222 (9,900)
Basic and diluted net income (loss) per share applicable to common stockholders:      
Continuing operations $ (0.49) $ 0.03 $ (1.03)
Discontinued operations, net of tax $ 0.01 $ 0.02 $ (0.03)
Basic and diluted net income (loss) per share applicable to common stockholders $ (0.48) $ 0.05 $ (1.06)
Shares used to calculate basic net income (loss) per share applicable to common stockholders:      
Shares used to calculate basic net income (loss) per share applicable to common stockholders 5,853 8,816 9,574
Shares used to calculate diluted net income (loss) per share applicable to common stockholders:      
Shares used to calculate diluted net income (loss) per share applicable to common stockholders 5,853 8,816 9,574
Class B      
Other income (expense):      
Net income (loss) from continuing operations (16,525) 735 (24,358)
Discontinued operations:      
Dividends paid to participating securities $ (127)   $ (657)
Basic and diluted net income (loss) per share applicable to common stockholders:      
Continuing operations $ (0.49) $ 0.03 $ (1.02)
Discontinued operations, net of tax $ 0.01 $ 0.02 $ (0.03)
Basic and diluted net income (loss) per share applicable to common stockholders $ (0.48) $ 0.05 $ (1.05)
Shares used to calculate basic net income (loss) per share applicable to common stockholders:      
Shares used to calculate basic net income (loss) per share applicable to common stockholders 34,157 26,798 24,412
Shares used to calculate diluted net income (loss) per share applicable to common stockholders:      
Shares used to calculate diluted net income (loss) per share applicable to common stockholders 40,010 36,999 33,986
[1] Excludes amortization of intangible assets from acquisitions.
[2] Components of amortization of intangible assets from acquisitions: