Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Sales	$ 58,870	$ 60,717	$ 194,451	$ 207,415
Cost of sales	43,632	42,992	140,819	148,736
Gross profit	15,238	17,725	53,632	58,679
Operating expenses:
General and administrative	10,425	7,541	30,529	22,540
Advertising	4,641	4,327	14,869	15,435
Depreciation	941	710	2,552	2,051
Total operating expenses	16,007	12,578	47,950	40,026
Income (loss) from operations	(769)	5,147	5,682	18,653
Other income:
Interest income, net	708	84	1,213	243
Other, net	259	287	718	741
Total other income	967	371	1,931	984
Income before provision for income taxes	198	5,518	7,613	19,637
Provision for income taxes	217	1,261	2,278	4,603
Net income (loss)	$ (19)	$ 4,257	$ 5,335	$ 15,034
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.00)	$ 0.21	$ 0.26	$ 0.75
Diluted (in dollars per share)	$ (0.00)	$ 0.21	$ 0.26	$ 0.74
Weighted average number of common shares outstanding:
Basic (in shares)	20,301	20,208	20,257	20,165
Diluted (in shares)	20,301	20,329	20,339	20,365
Cash dividends declared per common share (in dollars per share)	$ 0.30	$ 0.30	$ 0.90	$ 0.90