Description of Company and Basis of Presentation (Details - Statement of cash flows) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (9,521)	$ (520)	$ (11,643)	$ 841
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization			5,433	3,409
Stock-based compensation	2,466	2,786	4,809	4,683
Amortization of debt issuance costs			639
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 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	31,424	77,642
Supplemental disclosures of cash flow information:
Cash paid for interest			593
Cash paid for income taxes			14	220
Supplemental disclosures of non-cash activities:
Unpaid purchases of property and equipment			8,084	$ 8,584
Previously Reported [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	(9,509)		(11,602)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization			5,433
Stock-based compensation			4,809
Amortization of debt issuance costs			639
Deferred income taxes			(2,978)
Loss on disposal of property and equipment			46
Changes in operating assets and liabilities:
Accounts receivable, net			4,919
Contract assets			(1,238)
Inventory			5,325
Prepaid expenses and other assets			(7,909)
Accounts payable			4,344
Accrued compensation and benefits			(4,536)
Contract liabilities			8,808
Other accrued expenses and liabilities			(239)
Net cash provided by operating activities			5,821
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment			(21,437)
Net cash used in investing activities			(21,437)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock under equity compensation plans			998
Proceeds from finance lease			7,412
Principal payments on finance lease			(262)
Net cash provided by financing activities			8,148
Net decrease in cash, cash equivalents and restricted cash			(7,468)
Cash, cash equivalents and restricted cash, beginning of period			38,892
Cash, cash equivalents and restricted cash, end of period	31,424		31,424
Supplemental disclosures of cash flow information:
Cash paid for interest			882
Cash paid for income taxes			14
Supplemental disclosures of non-cash activities:
Unpaid purchases of property and equipment			7,972
Revision of Prior Period, Adjustment [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	(12)		(41)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization			0
Stock-based compensation			0
Amortization of debt issuance costs			0
Deferred income taxes			(31)
Loss on disposal of property and equipment			0
Changes in operating assets and liabilities:
Accounts receivable, net			0
Contract assets			0
Inventory			0
Prepaid expenses and other assets			0
Accounts payable			0
Accrued compensation and benefits			0
Contract liabilities			0
Other accrued expenses and liabilities			259
Net cash provided by operating activities			187
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment			(187)
Net cash used in investing activities			(187)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock under equity compensation plans			0
Proceeds from finance lease			0
Principal payments on finance lease			0
Net cash provided by financing activities			0
Net decrease in cash, cash equivalents and restricted cash			0
Cash, cash equivalents and restricted cash, beginning of period			0
Cash, cash equivalents and restricted cash, end of period	$ 0		0
Supplemental disclosures of cash flow information:
Cash paid for interest			(289)
Cash paid for income taxes			0
Supplemental disclosures of non-cash activities:
Unpaid purchases of property and equipment			$ 112