Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 89,257 $ 111,932
Marketable securities 100,299 100,161
Accounts receivable (net of allowance for doubtful accounts of $180 and $269 as of December 31, 2012 and December 31, 2013, respectively) 12,957 13,231
Prepaid expenses and other current assets 6,531 3,620
Deferred income tax assets 3,053 3,214
Total current assets 212,097 232,158
Property and equipment, net 13,198 6,576
Restricted cash 3,902 3,807
Intangibles, net 16,886 6,368
Goodwill 18,712 18,883
Other assets 5,348 1,550
Deferred income tax assets 9,470 10,196
Total assets 279,613 279,538
Current liabilities:    
Accounts payable 6,390 7,773
Accrued liabilities 20,110 16,657
Deferred revenue, current portion 82,496 65,875
Total current liabilities 108,996 90,305
Deferred revenue, net of current portion 2,667 3,774
Other long-term liabilities 611 822
Total liabilities 112,274 94,901
Commitments and contingencies (Note 11)      
Preferred stock, $0.01 par value - 5,000,000 shares authorized, 0 shares outstanding as of December 31, 2012 and December 31, 2013      
Equity:    
Common stock, $0.01 par value - 75,000,000 shares authorized as of December 31, 2012 and December 31, 2013; 24,814,007 and 25,371,844 shares issued as of December 31, 2012 and December 31, 2013, respectively; 24,814,007 and 24,103,201 outstanding as of December 31, 2012 and December 31, 2013, respectively 254 248
Additional paid-in capital 200,235 178,546
Retained earnings (accumulated deficit) (1,439) 6,243
Accumulated other comprehensive loss (1,186) (400)
Treasury stock, at cost - 0 and 1,268,643 shares as of December 31, 2012 and December 31, 2013, respectively (30,525)   
Total equity 167,339 184,637
Total liabilities and equity $ 279,613 $ 279,538