Accrued Expenses and Other Current Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued compensation and benefits	$ 11,519	$ 12,468
Accrued professional fees	1,057	1,172
Accrued commissions	2,010	1,883
Accrued taxes	2,017	2,230
Accrued music and FCC licensing	291	338
Accrued publisher fees	2,752	1,593
Accrued national representation fees	947	1,265
Deferred rent	1,951	1,694
Accrued other	2,616	3,105
Accrued expenses and other current liabilities	$ 25,160	$ 25,748