Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 102,026	$ 93,662
Cost of goods sold	72,006	68,367
Depreciation expense	3,087	3,146
Total cost of goods sold	75,093	71,513
Gross profit	26,933	22,149
Selling expenses	10,197	11,062
General and administrative	11,661	12,828
Amortization expense	152	192
Total operating expenses	22,010	24,082
Income (loss) from operations	4,923	(1,933)
Other income (expense):
Interest expense	(118)	(249)
Fair value gain on investments	0	1,731
Realized gain on investments, net	4	1,413
(Loss) gain on sale of property and equipment	(28)	189
Other income	47	84
Total other (expense) income	(95)	3,168
Income before provision for income taxes	4,828	1,235
Provision for income taxes	1,596	782
Net income	$ 3,232	$ 453
Basic earnings per common share	$ 0.21	$ 0.03
Diluted earnings per common share	$ 0.21	$ 0.03
Weighted average number of shares outstanding - Basic	15,597	15,748
Weighted average number of shares outstanding - Diluted	15,766	15,804