CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Current assets
Cash and cash equivalents	$ 1,936,291	$ 227,427
Marketable securities	816,512	81
Accounts receivable, net of allowance for expected credit losses ($4,622 and $4,318, respectively)	137,578	119,877
Inventories	77,752	60,398
Prepaid expenses and other current assets	74,961	58,198
Current assets held for sale		311,385
Total current assets	3,043,094	777,366
Property, plant and equipment, net	150,426	130,719
Long-term marketable securities	260,220	3,598
Long-term deferred tax assets	1,816	10,043
Goodwill	467,746	469,356
Intangible assets, net	170,507	186,534
Other assets	65,237	58,068
Non-current assets held for sale		183,828
Total assets	4,159,046	1,819,512
Current liabilities
Accounts payable	35,868	42,360
Deferred revenue	30,700	25,724
Accrued warranty and retrofit costs	2,491	2,330
Accrued compensation and benefits	41,708	33,183
Accrued restructuring costs	183	304
Accrued income taxes payable	430,650	8,711
Accrued expenses and other current liabilities	76,363	103,537
Current liabilities held for sale		128,939
Total current liabilities	617,963	345,088
Long-term debt		49,677
Long-term tax reserves	2,023	1,973
Long-term deferred tax liabilities	17,502	13,030
Long-term pension liabilities	720	705
Long-term operating lease liabilities	48,698	45,088
Other long-term liabilities	7,164	6,173
Non-current liabilities held for sale		32,444
Total liabilities	694,070	494,178
Commitments and contingencies (Note 16)
Stockholders' Equity
Preferred stock, $0.01 par value - 1,000,000 shares authorized, no shares issued or outstanding
Common stock, $0.01 par value - 125,000,000 shares authorized, 88,445,490 shares issued and 74,983,621 shares outstanding at March 31, 2022, 87,808,922 shares issued and 74,347,053 shares outstanding at September 30, 2021	885	878
Additional paid-in capital	1,986,796	1,976,112
Accumulated other comprehensive income	(7,398)	19,351
Treasury stock, at cost - 13,461,869 shares	(200,956)	(200,956)
Retained earnings (accumulated deficit)	1,685,649	(470,051)
Total stockholders' equity	3,464,976	1,325,334
Total liabilities and stockholders' equity	$ 4,159,046	$ 1,819,512