Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 17,137	$ 15,867	$ 49,109	$ 43,922
Cost of sales	9,557	11,411	27,548	29,159
Gross profit	7,580	4,456	21,561	14,763
Operating expenses:
Sales and marketing	3,875	3,316	10,670	10,729
General and administrative	3,081	2,602	9,795	8,315
Total operating expenses	6,956	5,918	20,465	19,044
Net loss (gain) on disposal of property and equipment	11	(40)	(16)	137
Restructuring costs	0	114	0	1,424
Income (loss) from operations	613	(1,536)	1,112	(5,842)
Other (expense) income:
Interest expense, net	(292)	(328)	(723)	(765)
Gain on extinguishment of debt	0	0	3,863	0
Other income, net	47	109	305	395
Total other (expense) income, net	(245)	(219)	3,445	(370)
Income (loss) before income taxes	368	(1,755)	4,557	(6,212)
Income tax provision (benefit)	84	(459)	402	(1,831)
Net income (loss)	$ 284	$ (1,296)	$ 4,155	$ (4,381)
Basic weighted-average shares outstanding (in shares)	22,524	23,243	22,901	23,243
Fully diluted weighted-average shares outstanding (in shares)	22,834	23,243	23,064	23,243
Basic earnings (loss) per share (in dollars per share)	$ 0.01	$ (0.06)	$ 0.18	$ (0.19)
Diluted earnings (loss) per share (in dollars per share)	$ 0.01	$ (0.06)	$ 0.18	$ (0.19)