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Composition Of Certain Financial Statement Captions (Tables)
 9 Months Ended
Jun. 30, 2023
Composition Of Certain Financial Statement Captions [Abstract]  
Schedule Of Accounts Receivable Accounts Receivable and Contract Assets
June 30,
2023		September 30,
2022
Trade accounts receivable$130,522 $162,531 
Accounts receivable from patent administration program licensees146,355 92,896 
Contract assets192,720 176,218 
Accounts receivable and contract assets, gross469,597 431,645 
Less: allowance for credit losses on accounts receivable and contract assets(10,147)(11,959)
Total accounts receivable and contract assets, net$459,450 $419,686 
Schedule Of Allowance For Credit Losses
Allowance for Credit LossesBeginning BalanceCharges/(Credits) 
to S&M and G&A		Additions/(Deductions)Ending Balance
For fiscal year-to-date period ended:
September 30, 2022$8,952 $5,460 $(7)$14,405 
June 30, 202314,405 (348)(1,793)12,264 
Allowance for credit losses includes the provision for estimated credit losses on our sales-type leases, which was not material as of June 30, 2023 and September 30, 2022.
Schedule Of Inventories Inventories
June 30,
2023		September 30,
2022
Raw materials$5,833 $10,026 
Work in process3,961 4,955 
Finished goods22,604 8,568 
Total inventories$32,398 $23,549 
Schedule Of Prepaid Expenses And Other Current Assets Prepaid Expenses and Other Current Assets
June 30,
2023		September 30,
2022
Prepaid expenses$25,550 $26,851 
Other current assets28,598 23,224 
Total prepaid expenses and other current assets$54,148 $50,075 
Schedule Of Accrued Liabilities Accrued Liabilities
June 30,
2023		September 30,
2022
Amounts payable to patent administration program partners$155,373 $63,106 
Accrued compensation and benefits93,470 84,111 
Accrued professional fees22,203 13,057 
Unpaid property, plant, and equipment additions17,938 15,428 
Accrued customer refunds4,519 3,674 
Accrued market development funds14,549 7,206 
Other accrued liabilities38,473 43,655 
Total accrued liabilities$346,525 $230,237 
Schedule Of Other Non-Current Liabilities
Other Non-Current Liabilities
June 30,
2023		September 30,
2022
Supplemental retirement plan obligations$4,088 $4,127 
Non-current tax liabilities (1)
91,333 83,758 
Other liabilities28,582 12,237 
Total other non-current liabilities$124,003 $100,122 
(1)        Refer to Note 12 "Income Taxes" for additional information related to our tax liabilities.