CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (11,643)	$ 841
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	5,433	3,409
Stock-based compensation	4,809	4,683
Amortization of debt issuance costs	639	520
Deferred income taxes	(3,009)	(2,495)
Loss on disposal of property and equipment	46	70
Changes in operating assets and liabilities:
Accounts receivable, net	4,919	(33)
Contract assets	(1,238)	(1,159)
Inventory	5,325	(12,999)
Prepaid expenses and other assets	(7,909)	(127)
Accounts payable	4,344	5,346
Accrued compensation and benefits	(4,536)	(2,411)
Contract liabilities	8,808	(5,352)
Other accrued expenses and liabilities	20	781
Net cash provided by (used in) operating activities	6,008	(8,926)
Cash flows from investing activities:
Purchase of property and equipment	(21,624)	(41,277)
Net cash used in investing activities	(21,624)	(41,277)
Cash flows from financing activities:
Proceeds from issuance of common stock under equity compensation plans	998	1,578
Proceeds from finance lease	7,412	0
Principal payments on finance lease	(262)	(249)
Net cash provided by financing activities	8,148	1,329
Net decrease in cash, cash equivalents and restricted cash	(7,468)	(48,874)
Cash, cash equivalents and restricted cash, beginning of period	38,892	126,516
Cash, cash equivalents and restricted cash, end of period	31,424	77,642
Supplemental disclosures of cash flow information:
Cash paid for interest	593	750
Cash paid for income taxes	14	220
Supplemental disclosures of non-cash investing activities:
Unpaid purchases of property and equipment	$ 8,084	$ 8,584