Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenues		$ 27,090	[1]	$ 26,711	[1]	$ 32,241	[1]	$ 34,206	[1]	$ 34,791	[1]	$ 31,687	[1]	$ 32,333	[1]	$ 35,577	[1]	$ 120,248	$ 134,388	$ 154,625
Gross profit		14,627	[1]	15,862	[1]	21,158	[1]	24,487	[1]	23,585	[1]	21,658	[1]	18,287	[1]	24,492	[1]	76,134	88,022	109,667
Total operating expenses		21,691	[1]	20,411	[1]	21,479	[1]	27,930	[1]	29,103	[1]	186,333	[1]	23,691	[1]	24,750	[1]	91,511	263,876	108,182
Loss from continuing operations		(10,081)	[1]	(10,063)	[1]	(1,909)	[1]	(4,248)	[1]	(6,463)	[1]	(156,998)	[1]	(4,190)	[1]	(3,599)	[1]	(26,301)	(171,253)	(98)
Income (loss) from discontinued operations		5,727	[1]	(3,658)	[1]	(3,324)	[1]	(2,369)	[1]	(3,440)	[1]	(3,267)	[1]	243	[1]	(963)	[1]	(3,624)	(7,423)	(12,784)
Net loss		$ (4,354)	[1]	$ (13,721)	[1]	$ (5,233)	[1]	$ (6,617)	[1]	$ (9,903)	[1]	$ (160,265)	[1]	$ (3,947)	[1]	$ (4,561)	[1]	$ (29,925)	$ (178,676)	$ (12,882)
Net loss per basic and diluted share	[1],[2]	$ (0.49)		$ (1.60)		$ (0.62)		$ (0.78)		$ (1.18)		$ (19.35)		$ (0.48)		$ (0.55)

[1] Selected quarterly financial data for periods prior to the nine months ended September 30, 2016 have been recast to reflect discontinued operations.

[2] Basic and diluted net loss per share, adjusted for the 1-for-12 reverse stock split, is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts will not necessarily equal the total for the year.