CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2024	Apr. 30, 2024
Current assets:
Cash and cash equivalents	$ 33,381	$ 38,106
Accounts receivable, net	20,962	16,644
Contract assets	14,209	12,364
Inventory	29,196	30,375
Prepaid expenses and other current assets	5,872	6,513
Total current assets	103,620	104,002
Property and equipment, net	185,617	186,514
Operating lease right-of-use assets	40,741	41,157
Other assets	4,664	4,884
Total assets	334,642	336,557
Current liabilities:
Accounts payable	19,999	20,667
Accrued compensation and benefits	5,608	5,437
Contract liabilities	37,659	39,887
Current portion of operating lease liabilities	1,399	1,354
Other current liabilities	6,417	3,221
Total current liabilities	71,082	70,566
Convertible senior notes, net	153,867	153,593
Operating lease liabilities, less current portion	43,971	44,336
Finance lease liabilities, less current portion	6,725	7,101
Other liabilities	361	72
Total liabilities	276,006	275,668
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; 63,790 and 63,568 shares issued and outstanding at respective dates	64	64
Additional paid-in capital	635,977	632,696
Accumulated deficit	(577,405)	(571,871)
Total stockholders’ equity	58,636	60,889
Total liabilities and stockholders’ equity	$ 334,642	$ 336,557