Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Income Statement [Abstract]
Net sales	$ 84,394	$ 274,609
Cost of sales	52,923	144,667
Gross profit	31,471	129,942
Operating expenses:
Research and development	1,673	1,808
Selling, marketing, and distribution	8,027	10,634
General and administrative	17,854	17,614
Total operating expenses	27,554	30,056
Operating income	3,917	99,886
Other income/(expense), net:
Other income/(expense), net	673	660
Interest expense, net	(433)	(544)
Total other income/(expense), net	240	116
Income from operations before income taxes	4,157	100,002
Income tax expense	845	23,120
Net income	$ 3,312	$ 76,882
Net income per share:
Basic - net income	$ 0.07	$ 1.59
Diluted - net income	$ 0.07	$ 1.57
Weighted average number of common shares outstanding:
Basic	45,739	48,394
Diluted	46,102	49,050