CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Income Statement [Abstract]
Net sales	$ 50,894,000	$ 70,105,000	$ 149,006,000	$ 201,633,000
Cost of sales	26,905,000	38,010,000	80,015,000	107,518,000
Gross profit	23,989,000	32,095,000	68,991,000	94,115,000
Operating expenses:
Research and development	1,575,000	1,377,000	4,887,000	4,354,000
Selling, marketing, and distribution	14,522,000	15,627,000	40,226,000	44,490,000
General and administrative	10,893,000	10,366,000	32,575,000	31,020,000
Total operating expenses	26,990,000	27,370,000	77,688,000	79,864,000
Operating (loss)/income	(3,001,000)	4,725,000	(8,697,000)	14,251,000
Other income, net:
Other income, net	226,000	258,000	1,052,000	1,004,000
Interest expense, net	(213,000)	(68,000)	(641,000)	(167,000)
Total other income, net	13,000	190,000	411,000	837,000
(Loss)/income from operations before income taxes	(2,988,000)	4,915,000	(8,286,000)	15,088,000
Income tax (benefit)/expense	(125,000)	1,149,000	(98,000)	3,282,000
Net (loss)/income	$ (2,863,000)	$ 3,766,000	$ (8,188,000)	$ 11,806,000
Net (loss)/income per share:
Basic	$ (0.21)	$ 0.27	$ (0.61)	$ 0.84
Diluted	$ (0.21)	$ 0.27	$ (0.61)	$ 0.82
Weighted average number of common shares outstanding:
Basic	13,331	14,054	13,413	14,091
Diluted	13,331	14,205	13,413	14,332