Summarized Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 140,106	$ 135,113	$ 135,252	$ 136,572	$ 123,289	$ 125,669	$ 138,244	$ 147,177	$ 547,043	$ 534,379	$ 571,020
Gross Profit	38,257	39,143	38,292	41,761	35,300	34,676	43,482	48,440	157,453	161,898	175,862
Income (loss) from continuing operations	1,821	3,083	2,482	3,458	(899)	580	5,921	5,722	10,844	11,324	17,471
Income (loss) from discontinued operations, net	(20,074)	174	(489)	(344)	(559)	(166)	(427)	(9,115)	(20,733)	(10,267)	291
Net income (loss)	$ (18,253)	$ 3,257	$ 1,993	$ 3,114	$ (1,458)	$ 414	$ 5,494	$ (3,393)	$ (9,889)	$ 1,057	$ 17,762
Basic (in dollars per share)	$ 0.06	$ 0.10	$ 0.08	$ 0.12	$ (0.03)	$ 0.02	$ 0.20	$ 0.19	$ 0.36	$ 0.38	$ 0.57
Diluted (in dollars per share)	0.06	0.10	0.08	0.11	(0.03)	0.02	0.20	0.19	0.35	0.38
Basic (in dollars per share)	(0.66)	0.01	(0.01)	(0.02)	(0.02)	(0.01)	(0.01)	(0.30)	(0.69)	(0.35)	0.01
Diluted (in dollars per share)	(0.65)	0.01	(0.01)	(0.01)	(0.02)	(0.01)	(0.01)	(0.30)	(0.68)	(0.35)	0.01
Basic (in dollars per share)	(0.60)	0.11	0.07	0.10	(0.05)	0.01	0.19	(0.11)	(0.33)	0.03	0.58
Diluted (in dollars per share)	$ (0.59)	$ 0.11	$ 0.07	$ 0.10	$ (0.05)	$ 0.01	$ 0.19	$ (0.11)	$ (0.33)	$ 0.03	$ 0.57