CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 30, 2023	Apr. 30, 2022
Current assets:
Cash and cash equivalents	$ 38,542	$ 126,166
Accounts receivable, net	18,298	20,547
Contract assets	9,609	5,369
Inventory	43,908	26,062
Prepaid expenses and other current assets	2,094	1,879
Total current assets	112,451	180,023
Property and equipment, net	177,369	92,955
Operating lease right-of-use assets	42,772	36,806
Deferred tax assets	113,639	115,082
Other assets	4,473	4,627
Restricted cash	350	350
Total assets	451,054	429,843
Current liabilities:
Accounts payable	24,593	9,504
Accrued compensation and benefits	8,780	8,418
Contract liabilities	37,352	53,798
Current portion of operating lease liabilities	1,358	2,969
Other current liabilities	1,626	1,072
Total current liabilities	73,709	75,761
Convertible senior notes, net	140,623	139,577
Operating lease liabilities, less current portion	45,690	37,886
Finance lease liabilities, less current portion	1,562	2,093
Total liabilities	261,584	255,317
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; 62,692 and 61,807 shares issued and outstanding at respective dates	63	62
Additional paid-in capital	620,224	605,841
Accumulated deficit	(430,817)	(431,377)
Total stockholders’ equity	189,470	174,526
Total liabilities and stockholders’ equity	$ 451,054	$ 429,843