Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Sales	$ 65,394	$ 67,386	$ 135,581	$ 146,698
Cost of sales	46,943	48,212	97,187	105,744
Gross profit	18,451	19,174	38,394	40,954
Operating expenses:
General and administrative	10,753	6,958	20,104	14,999
Advertising	3,879	3,435	10,228	11,108
Depreciation	858	694	1,611	1,341
Total operating expenses	15,490	11,087	31,943	27,448
Income from operations	2,961	8,087	6,451	13,506
Other income:
Interest income, net	388	74	505	159
Other, net	261	170	459	454
Total other income	649	244	964	613
Income before provision for income taxes	3,610	8,331	7,415	14,119
Provision for income taxes	1,031	1,982	2,061	3,342
Net income	$ 2,579	$ 6,349	$ 5,354	$ 10,777
Net income per common share:
Basic (in dollars per share)	$ 0.13	$ 0.31	$ 0.26	$ 0.53
Diluted (in dollars per share)	$ 0.13	$ 0.31	$ 0.26	$ 0.53
Weighted average number of common shares outstanding:
Basic (in shares)	20,261	20,178	20,235	20,144
Diluted (in shares)	20,344	20,568	20,318	20,384
Cash dividends declared per common share (in dollars per share)	$ 0.30	$ 0.30	$ 0.60	$ 0.60