CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Cash flows from operating activities:
Net (loss)/income	$ (8,188)	$ 11,806
Adjustments to reconcile net income to net cash provided by/ (used in) operating activities:
Depreciation and amortization	12,556	12,550
Loss on sale/disposition of assets	94	127
Provision for (benefit from) credit losses on accounts receivable	12	(8)
Deferred income taxes		63
Stock-based compensation expense	2,900	2,336
Changes in operating assets and liabilities:
Accounts receivable	3,725	(7,851)
Inventories	16,171	(45,275)
Prepaid expenses and other current assets	(1,172)	(2,574)
Income taxes	(183)	(580)
Accounts payable	(2,767)	3,789
Accrued payroll, incentives, and profit sharing	(1,006)	(3,961)
Right of use assets	413	1,224
Accrued expenses	2,242	4,024
Other assets	43	(308)
Lease liabilities	(577)	(1,351)
Other non-current liabilities		(197)
Net cash provided by/(used in) operating activities	24,263	(26,186)
Cash flows from investing activities:
Payments to acquire patents and software	(3,036)	(1,937)
Proceeds from sale of property and equipment	30
Payments to acquire property and equipment	(1,225)	(2,774)
Net cash used in investing activities	(4,231)	(4,711)
Cash flows from financing activities:
Payments on notes and loans payable	(15,170)
Payments to acquire treasury stock	(2,568)	(7,011)
Cash paid for debt issuance costs	(88)
Proceeds from exercise of options to acquire common stock, including employee stock purchase plan	287	413
Payment of employee withholding tax related to restricted stock units	(304)	(528)
Net cash used in financing activities	(17,843)	(7,126)
Net increase/(decrease) in cash and cash equivalents	2,189	(38,023)
Cash and cash equivalents, beginning of period	19,521	60,801
Cash and cash equivalents, end of period	21,710	22,778
Supplemental disclosure of cash flow information Cash paid for:
Interest	597	114
Income taxes	$ 86	$ 3,792