CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Current assets
Cash and cash equivalents	$ 678,910	$ 658,274
Short-term marketable securities	338,873	911,764
Accounts receivable, net of allowance for expected credit losses ($8,057 and $5,162, respectively)	156,535	163,758
Inventories	128,198	85,544
Derivative asset	13,036	124,789
Short-term restricted cash	4,650	382,596
Prepaid expenses and other current assets	98,754	132,621
Total current assets	1,418,956	2,459,346
Property, plant and equipment, net	205,744	154,470
Long-term marketable securities	111,338	352,020
Long-term deferred tax assets	571	1,169
Goodwill	784,339	513,623
Intangible assets, net	294,301	178,401
Other assets	70,471	57,093
Total assets	2,885,720	3,716,122
Current liabilities
Accounts payable	35,796	38,654
Deferred revenue	34,614	39,748
Accrued warranty and retrofit costs	10,223	2,890
Accrued compensation and benefits	33,911	41,898
Accrued customer deposits	17,707	13,447
Accrued VAT payable	20,595	16,418
Accrued income taxes payable	7,378	28,419
Accrued expenses and other current liabilities	50,704	49,072
Total current liabilities	210,928	230,546
Long-term tax reserves	380	1,684
Long-term deferred tax liabilities	67,301	64,555
Long-term operating lease liabilities	60,436	49,227
Other long-term liabilities	12,175	6,724
Total liabilities	351,220	352,736
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, 71,294,247 shares issued and 57,832,378 shares outstanding at September 30, 2023, 88,482,125 shares issued and 75,020,256 shares outstanding at September 30, 2022	713	885
Additional paid-in capital	1,156,160	1,992,017
Accumulated other comprehensive income (loss)	(62,426)	(83,916)
Treasury stock, at cost - 13,461,869 shares at September 30, 2023 and September 30, 2022	(200,956)	(200,956)
Retained earnings	1,641,009	1,655,356
Total stockholders' equity	2,534,500	3,363,386
Total liabilities and stockholders' equity	$ 2,885,720	$ 3,716,122