Summarized Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 138,388	$ 135,219	$ 140,560	$ 152,568	$ 140,106	$ 135,113	$ 135,252	$ 136,572	$ 566,735	$ 547,043	$ 534,379
Gross Profit	42,096	42,091	47,991	47,115	38,257	39,143	38,292	41,761	179,293	157,453	161,898
Income (loss) from continuing operations	3,126	(21,137)	8,608	7,755	1,821	3,083	2,482	3,458	(1,648)	10,844	11,324
Income (loss) from discontinued operations, net	(788)	(2)	0	(911)	(20,074)	174	(489)	(344)	(1,701)	(20,733)	(10,267)
Net income (loss)	$ 2,338	$ (21,139)	$ 8,608	$ 6,844	$ (18,253)	$ 3,257	$ 1,993	$ 3,114	$ (3,349)	$ (9,889)	$ 1,057
Basic (in dollars per share)	$ 0.09	$ (0.60)	$ 0.26	$ 0.25	$ 0.06	$ 0.10	$ 0.08	$ 0.12	$ (0.05)	$ 0.36	$ 0.38
Diluted (in dollars per share)	0.09	(0.60)	0.26	0.25	0.06	0.10	0.08	0.11	(0.05)	0.35
Basic (in dollars per share)	(0.02)	0	0	(0.03)	(0.66)	0.01	(0.01)	(0.02)	(0.05)	(0.69)	(0.35)
Diluted (in dollars per share)	(0.02)	0	0	(0.03)	(0.65)	0.01	(0.01)	(0.01)	(0.05)	(0.68)	(0.35)
Basic (in dollars per share)	0.07	(0.60)	0.26	0.22	(0.60)	0.11	0.07	0.10	(0.10)	(0.33)	0.03
Diluted (in dollars per share)	$ 0.07	$ (0.60)	$ 0.26	$ 0.22	$ (0.59)	$ 0.11	$ 0.07	$ 0.10	$ (0.10)	$ (0.33)	$ 0.03