Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 102,700,000	$ 46,665,000
Cost of goods sold, excluding depreciation and amortization	52,218,000	29,693,000
Gross profit	50,482,000	16,972,000
Operating expenses:
Selling, general and administrative	18,171,000	13,348,000
Depreciation and amortization	729,000	602,000
Total operating expenses	18,900,000	13,950,000
Income from operations	31,582,000	3,022,000
Other income (expense):
Equity in income of unconsolidated affiliate	710,000	359,000
Gain (loss) on marketable securities	(62,000)	231,000
Interest income, net	18,000	68,000
Total other income	666,000	658,000
Income before provision for income taxes	32,248,000	3,680,000
Provision for income taxes	5,162,000	680,000
Net income	$ 27,086,000	$ 3,000,000
Basic earnings per common share (in dollars per share)	$ 2.01	$ 0.23
Diluted earnings per common share (in dollars per share)	$ 1.94	$ 0.23
Basic weighted average common shares outstanding (in shares)	13,449,987	13,142,872
Diluted weighted average common shares outstanding (in shares)	13,972,145	13,168,725