Quarterly 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	Dec. 31, 2013
Quarterly Financial Information (Unaudited)
Net sales	$ 93,567	$ 107,697	$ 95,536	$ 77,310	$ 87,865	$ 77,374	$ 53,236	$ 42,531	$ 374,110	$ 261,006	$ 196,370
Gross profit	31,429	43,049	35,835	25,508	29,266	26,663	15,554	10,244	135,821	81,727	59,496
Income (loss) from continuing operations	(1,615)	14,760	12,155	5,960	5,638	6,768	3,070	496	31,261	15,972	11,199
Income (loss) income from a discontinued operation, net of taxes	(679)			281	(606)	699	(1,167)	(1,596)	(398)	(2,670)	(2,612)
Net income (loss)	(2,294)	14,760	12,155	6,242	5,032	7,467	1,903	(1,100)	30,863	13,302	8,587
Preferred stock dividends	(94)	(7,096)	(12,747)	(12,611)	(12,805)	(10,692)	(10,548)	(10,432)	(32,548)	(44,477)	(35,268)
Net (loss) income attributable to common stockholders	$ (2,388)	$ 7,664	$ (592)	$ (6,369)	$ (7,773)	$ (3,225)	$ (8,645)	$ (11,532)	$ (1,685)	$ (31,175)	$ (26,681)
Basic and diluted loss per share:
Continuing operations	$ (0.03)	$ 0.19	$ (0.02)	$ (0.16)	$ (0.17)	$ (0.10)	$ (0.18)	$ (0.24)	$ (0.03)	$ (0.69)	$ (0.59)
Discontinued operation	(0.01)			0.01	(0.01)	0.02	(0.03)	(0.04)	(0.01)	(0.07)	(0.06)
Total basic and diluted loss per share	$ (0.04)	$ 0.19	$ (0.02)	$ (0.15)	$ (0.18)	$ (0.08)	$ (0.21)	$ (0.28)	$ (0.04)	$ (0.76)	$ (0.65)