Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Sales	$ 256,858	$ 273,417	$ 309,215
Cost of sales	185,844	195,341	219,267
Gross profit	71,014	78,076	89,948
Operating expenses:
General and administrative	49,474	30,829	28,293
Advertising	19,424	18,799	21,641
Depreciation	3,546	2,738	2,427
Total operating expenses	72,444	52,366	52,361
(Loss) income from operations	(1,430)	25,710	37,587
Other income:
Interest income, net	2,070	335	314
Other, net	944	1,026	1,315
Total other income	3,014	1,361	1,629
Income before provision for income taxes	1,584	27,071	39,216
Provision for income taxes	1,351	5,971	8,613
Net income	$ 233	$ 21,100	$ 30,603
Earnings Per Share [Abstract]
Basic (in dollars per share)	$ 0.01	$ 1.05	$ 1.53
Diluted (in dollars per share)	$ 0.01	$ 1.04	$ 1.52
Weighted average number of common shares outstanding:
Basic (in shares)	20,275	20,176	20,060
Diluted (in shares)	20,339	20,358	20,119
Cash dividends declared per common share (in dollars per share)	$ 1.20	$ 1.20	$ 1.12