CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2023	Apr. 30, 2023
Current assets:
Cash and cash equivalents	$ 24,898	$ 38,542
Accounts receivable, net	16,209	18,298
Contract assets	14,454	9,609
Inventory	40,866	43,908
Prepaid expenses and other current assets	1,892	2,094
Total current assets	98,319	112,451
Property and equipment, net	182,299	177,369
Operating lease right-of-use assets	42,374	42,772
Deferred tax assets	114,238	113,639
Other assets	4,757	4,473
Restricted cash	350	350
Total assets	442,337	451,054
Current liabilities:
Accounts payable	22,813	24,593
Accrued compensation and benefits	4,667	8,780
Contract liabilities	33,019	37,352
Current portion of operating lease liabilities	1,262	1,358
Other current liabilities	2,296	1,626
Total current liabilities	64,057	73,709
Convertible senior notes, net	140,888	140,623
Operating lease liabilities, less current portion	45,370	45,690
Finance lease liabilities, less current portion	1,424	1,562
Total liabilities	251,739	261,584
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000 shares authorized; no shares issued and outstanding at respective dates	0	0
Common stock, $0.001 par value; 150,000 shares authorized; 63,111 and 62,692 shares issued and outstanding at respective dates	63	63
Additional paid-in capital	623,445	620,224
Accumulated deficit	(432,910)	(430,817)
Total stockholders’ equity	190,598	189,470
Total liabilities and stockholders’ equity	$ 442,337	$ 451,054