Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information (Unaudited)
Total net sales	$ 72,625	$ 71,681	$ 66,901	$ 66,866	$ 68,516	$ 70,987	$ 61,454	$ 54,857	$ 278,073	$ 255,814
Gross profit	21,998	25,419	22,381	21,521	20,979	23,308	19,875	14,428	91,319	78,590
Net income (loss) from continuing operations	$ (2,129)	$ (656)	$ 1,552	$ (3,097)	$ (7,235)	$ (1,085)	$ (802)	$ (5,677)	$ (4,330)	$ (14,799)
Basic and diluted loss per share:
earnings (loss) per share from continuing operations (in dollars per share)	$ (0.19)	$ (0.06)	$ 0.14	$ (0.28)	$ (0.65)	$ (0.10)	$ (0.07)	$ (0.51)	$ (0.39)	$ (1.33)