CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (UNAUDITED)
Net sales	$ 46,900	$ 63,584
Cost of sales	27,595	40,407
Gross earnings	19,305	23,177
Selling and administrative expenses	17,671	21,836
Earnings from operations	1,634	1,341
Interest income	131	149
Interest expense	(7)	(51)
Other expense, net	138	407
Earnings before provision for income taxes	1,896	1,846
Provision for income taxes	571	684
Net earnings	$ 1,325	$ 1,162
Basic weighted average shares outstanding (in shares)	9,680	9,781
Diluted weighted average shares outstanding (in shares)	9,686	9,786
Basic earnings per share (in dollars per share)	$ 0.14	$ 0.12
Diluted earnings per share (in dollars per share)	0.14	0.12
Cash dividends declared (per share)	$ 0.24	$ 0.24
Comprehensive income (loss)	$ 1,365	$ (1,258)