DEBT - Narrative (Details)									8 Months Ended	12 Months Ended
	May 07, 2025 USD ($)	Feb. 05, 2021 USD ($) $ / shares	Feb. 05, 2021 USD ($) $ / shares	Feb. 05, 2021 USD ($) $ / shares	Feb. 05, 2021 USD ($) tradingDay $ / shares	Feb. 05, 2021 USD ($) businessDay $ / shares	Feb. 05, 2021 USD ($) shares $ / shares	Feb. 05, 2021 USD ($) patent $ / shares	Sep. 30, 2021 USD ($)	Sep. 30, 2025 USD ($) shares	Sep. 30, 2024 USD ($)	Feb. 13, 2024 USD ($)	Feb. 28, 2021 USD ($)	Feb. 02, 2021 $ / shares
Debt Instrument [Line Items]
Outstanding borrowings										$ 4,335,000
Spanish Government Agencies | ICAR Vision Systems, S.L.
Debt Instrument [Line Items]
Amount outstanding under loan agreement										4,300,000	$ 2,700,000
Spanish Government Agencies | ICAR Vision Systems, S.L. | Other Current Liabilities
Debt Instrument [Line Items]
Current loans payable										300,000	300,000
Spanish Government Agencies | ICAR Vision Systems, S.L. | Other Noncurrent Liabilities
Debt Instrument [Line Items]
Noncurrent loans payable										$ 4,000,000	2,400,000
Spanish Government Agencies | Minimum | ICAR Vision Systems, S.L.
Debt Instrument [Line Items]
Debt interest rate (as a percent)										0.00%
Repayment period of loan agreements										5 years
Spanish Government Agencies | Maximum | ICAR Vision Systems, S.L.
Debt Instrument [Line Items]
Debt interest rate (as a percent)										3.72%
Repayment period of loan agreements										12 years
Revolving Credit Facility
Debt Instrument [Line Items]
Unused revolving line facility fee (as a percent)	0.25%
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Debt issuance costs	$ 200,000
Maximum borrowing capacity	25,000,000											$ 35,000,000
Additional value, line of credit facility, maximum borrowing capacity	15,000,000											$ 15,000,000
Commitment fees	125,000
Indebtedness amount	500,000
Maximum net leverage ratio										2.50
Maximum net leverage ratio if engaged in a share purchase program										2.75
Net leverage ratio										1.06
Outstanding borrowings										$ 0
Line of Credit | Secured Debt
Debt Instrument [Line Items]
Debt issued	$ 75,000,000
Foreign Letter Of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Cash deposit, percentage	115.00%
Letter of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Cash deposit, percentage	105.00%
2026 Notes | Significant Other Observable Inputs (Level 2)
Debt Instrument [Line Items]
Fair value										152,300,000	146,900,000
2026 Notes | Convertible Debt
Debt Instrument [Line Items]
Debt issued										$ 155,300,000			$ 155,300,000
Debt interest rate (as a percent)		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%		0.75%
Debt conversion ratio (per $1,000 principal amount)			0.0479731000
Debt conversion price (in dollars per share) | $ / shares		$ 20.85	$ 20.85	$ 20.85	$ 20.85	$ 20.85	$ 20.85	$ 20.85
Conversion price premium percentage														0.375
Proceeds from debt offerings, net of discounts, commissions and expenses				$ 149,700,000
Debt issuance costs		$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 5,500,000
Remaining unamortized debt discount										$ 3,034,000	11,649,000
Outstanding borrowings										$ 152,216,000	$ 143,601,000
2026 Notes | Convertible Debt | Common Stock
Debt Instrument [Line Items]
Share price (in dollars per share) | $ / shares														$ 15.16
2026 Notes | Convertible Debt | During any Calendar Quarter Commencing after the Calendar Quarter Ending on June 30, 2021
Debt Instrument [Line Items]
Debt conversion price percentage		1.30	1.30	1.30	1.30	1.30	1.30	1.30
Trading days in period | tradingDay					20
Consecutive trading days in period | tradingDay					30
2026 Notes | Convertible Debt | Measurement Period
Debt Instrument [Line Items]
Debt conversion price percentage		0.98	0.98	0.98	0.98	0.98	0.98	0.98
Consecutive trading days in period					5	5
2026 Notes | Convertible Debt | Embedded Conversion Derivative
Debt Instrument [Line Items]
Payment costs related to hedge transactions				$ 9,300,000
Embedded derivative, fair value of embedded derivative liability		$ 33,200,000	$ 33,200,000	33,200,000	$ 33,200,000	$ 33,200,000	$ 33,200,000	$ 33,200,000
Value of remaining embedded derivative allocated to host contract		$ 116,500,000	116,500,000	116,500,000	116,500,000	116,500,000	116,500,000	116,500,000
Derivative interest rate										6.71%
Remaining unamortized debt discount										$ 3,000,000.0
Remaining debt discount amortization period										3 months 18 days
Additional Notes | Convertible Debt
Debt Instrument [Line Items]
Option period to purchase additional notes		13 days
Additional aggregate principal amount purchased		$ 20,300,000	$ 20,300,000	$ 20,300,000	$ 20,300,000	$ 20,300,000	$ 20,300,000	$ 20,300,000
Notes Hedge | Convertible Debt
Debt Instrument [Line Items]
Debt conversion price (in dollars per share) | $ / shares		$ 20.85	$ 20.85	$ 20.85	$ 20.85	$ 20.85	$ 20.85	$ 20.85
Conversion price premium percentage														0.750
Number of shares that can initially be converted into common stock | shares							7,400,000
Strike price of warrants (in dollar per share) | $ / shares		$ 26.53	$ 26.53	$ 26.53	$ 26.53	$ 26.53	$ 26.53	$ 26.53
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Convertible senior notes	Convertible senior notes	Convertible senior notes	Convertible senior notes	Convertible senior notes	Convertible senior notes	Convertible senior notes
Senior notes hedge balance		$ 33,200,000	$ 33,200,000	$ 33,200,000	$ 33,200,000	$ 33,200,000	$ 33,200,000	$ 33,200,000
Shares purchased under the notes hedge (in shares) | shares										0
Increase in additional paid-in-capital for sale or warrants									$ 23,900,000
Warrants exercised (in shares) | shares										0
Warrants outstanding (in shares) | shares										0
Notes Hedge | Convertible Debt | Observation Period
Debt Instrument [Line Items]
Consecutive trading days in period | patent								80
Incremental dilution of earnings per share of warrants (in shares) | shares										0