Accrued Expenses and Other Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Schedule of accrued expenses and other current liabilities    
Accrued compensation $ 3,429 $ 3,612
Accrued content fees 577 334
Accrued business acquisition consideration 500   
Unearned revenue on contracts 191 255
Other 1,596 1,291
Total $ 6,293 $ 5,492