Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Sales	$ 75,436	$ 69,936	$ 171,640	$ 149,924
Cost of sales	52,418	49,934	121,837	108,061
Gross profit	23,018	20,002	49,803	41,863
Operating expenses:
General and administrative	6,809	6,303	14,563	12,811
Advertising	5,131	4,756	14,164	13,380
Depreciation	607	572	1,169	1,140
Total operating expenses	12,547	11,631	29,896	27,331
Income from operations	10,471	8,371	19,907	14,532
Other income:
Interest income, net	66	459	156	1,026
Other, net	338	304	593	561
Total other income	404	763	749	1,587
Income before provision for income taxes	10,875	9,134	20,656	16,119
Provision for income taxes	2,463	2,469	4,476	4,111
Net income	$ 8,412	$ 6,665	$ 16,180	$ 12,008
Net income per common share:
Basic (in dollars per share)	$ 0.42	$ 0.33	$ 0.81	$ 0.60
Diluted (in dollars per share)	$ 0.42	$ 0.33	$ 0.81	$ 0.60
Basic (in shares)	20,063	19,963	20,024	20,098
Diluted (in shares)	20,154	19,973	20,098	20,109
Cash dividends declared per common share (in dollars per share)	$ 0.28	$ 0.27	$ 0.56	$ 0.54