CONSOLIDATED AND COMBINED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME/(LOSS) - USD ($)	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Income Statement [Abstract]
Net sales (including $2.4 million of related party sales for the four months of our fiscal year 2021 prior to the Separation, and $15.1 million and $17.5 million of related party sales for fiscal year 2020 and 2019, respectively)	$ 276,687,000	$ 167,379,000	$ 177,363,000
Cost of sales	149,859,000	96,363,000	93,889,000
Gross profit	126,828,000	71,016,000	83,474,000
Operating expenses:
Research and development	5,378,000	4,995,000	4,859,000
Selling, marketing, and distribution	56,773,000	38,596,000	31,955,000
General and administrative	41,182,000	41,292,000	50,329,000
Goodwill impairment	0	98,929,000	10,396,000
Total operating expenses	103,333,000	183,812,000	97,539,000
Operating income/(loss)	23,495,000	(112,796,000)	(14,065,000)
Other income/(expense), net:
Other income/(expense), net	497,000	(21,000)	54,000
Interest income/(expense), net	300,000	4,963,000	5,224,000
Total other income/(expense), net	797,000	4,942,000	5,278,000
Income/(loss) from operations before income taxes	24,292,000	(107,854,000)	(8,787,000)
Income tax expense/(benefit)	5,887,000	(11,653,000)	734,000
Net income/(loss)/comprehensive income/(loss)	$ 18,405,000	$ (96,201,000)	$ (9,521,000)
Net income/(loss) per share:
Basic	$ 1.31	$ (6.88)	$ (0.68)
Diluted	$ 1.29	$ (6.88)	$ (0.68)
Weighted average number of common shares outstanding:
Basic	13,997,000	13,975,000	13,975,000
Diluted	14,225,000	13,975,000	13,975,000