Interim Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 35,656	$ 40,339	$ 37,454	$ 31,471	$ 33,280	$ 41,144	$ 36,243	$ 31,080	$ 144,920	$ 141,747
Cost of revenues	7,047	9,120	8,277	6,886	7,888	11,045	9,930	9,011	31,330	37,874
Other operating expenses	24,610	25,669	23,619	23,506	23,752	25,210	23,016	23,849	97,404	95,827
Income (loss) before income taxes	(3,123)	2,179	2,192	(2,380)	(2,621)	1,047	(1,265)	(6,516)	(1,132)	(9,355)
Income tax (expense) benefit	324	(213)	(186)	(118)	(454)	(52)	(23)	(71)	(193)	(600)
Net income (loss)	$ (2,799)	$ 1,966	$ 2,006	$ (2,498)	$ (3,075)	$ 995	$ (1,288)	$ (6,587)	$ (1,325)	$ (9,955)
Basic income (loss) per share	$ (0.06)	$ 0.04	$ 0.04	$ (0.05)	$ (0.07)	$ 0.02	$ (0.03)	$ (0.14)	$ (0.03)	$ (0.22)
Diluted income (loss) per share	$ (0.06)	$ 0.04	$ 0.04	$ (0.05)	$ (0.07)	$ 0.02	$ (0.03)	$ (0.14)	$ (0.03)	$ (0.22)