CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Income Statement [Abstract]
Net sales	$ 57,931,000	$ 54,436,000	$ 101,376,000	$ 98,112,000
Cost of sales	31,441,000	28,474,000	55,167,000	53,111,000
Gross profit	26,490,000	25,962,000	46,209,000	45,001,000
Operating expenses:
Research and development	1,675,000	1,557,000	3,274,000	3,313,000
Selling, marketing, and distribution	15,414,000	13,924,000	27,468,000	25,704,000
General and administrative	9,423,000	10,615,000	19,573,000	21,679,000
Total operating expenses	26,512,000	26,096,000	50,315,000	50,696,000
Operating loss	(22,000)	(134,000)	(4,106,000)	(5,695,000)
Other income, net:
Other income, net	53,000	585,000	92,000	826,000
Interest income/(expense), net	6,000	(242,000)	(7,000)	(428,000)
Total other income, net	59,000	343,000	85,000	398,000
Income/(loss) from operations before income taxes	37,000	209,000	(4,021,000)	(5,297,000)
Income tax (benefit)/expense	(40,000)	(161,000)	15,000	28,000
Net income/(loss)	$ 77,000	$ 370,000	$ (4,036,000)	$ (5,325,000)
Net income/(loss) per share:
Basic	$ 0.01	$ 0.03	$ (0.31)	$ (0.4)
Diluted	$ 0.01	$ 0.03	$ (0.31)	$ (0.4)
Weighted average number of common shares outstanding:
Basic	13,010	13,465	13,100	13,454
Diluted	13,256	13,589	13,100	13,454