CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Income Statement [Abstract]
Net sales	$ 60,232,000	$ 57,931,000	$ 101,875,000	$ 101,376,000
Cost of sales	31,325,000	31,441,000	54,043,000	55,167,000
Gross profit	28,907,000	26,490,000	47,832,000	46,209,000
Operating expenses:
Research and development	1,866,000	1,675,000	3,540,000	3,274,000
Selling, marketing, and distribution	14,973,000	15,414,000	26,356,000	27,468,000
General and administrative	8,998,000	9,423,000	17,439,000	19,573,000
Total operating expenses	25,837,000	26,512,000	47,335,000	50,315,000
Operating income/(loss)	3,070,000	(22,000)	497,000	(4,106,000)
Other (expense)/income, net:
Other income, net	59,000	53,000	141,000	92,000
Interest income/(expense), net	(6,000)	6,000	142,000	(7,000)
Total other income, net	53,000	59,000	283,000	85,000
Income/(loss) from operations before income taxes	3,123,000	37,000	780,000	(4,021,000)
Income tax expense/(benefit)	12,000	(40,000)	34,000	15,000
Net income/(loss)	$ 3,111,000	$ 77,000	$ 746,000	$ (4,036,000)
Net income/(loss) per share:
Basic	$ 0.24	$ 0.01	$ 0.06	$ (0.31)
Diluted	$ 0.24	$ 0.01	$ 0.06	$ (0.31)
Weighted average number of common shares outstanding:
Basic	12,860	13,010	12,862	13,100
Diluted	13,145	13,256	13,211	13,100