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v3.20.2

Commitments and Contingencies - Narrative (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2015 option | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($)
Operating Leased Assets [Line Items] |  |  |  |
Educational services and facilities |  | $ 155,932,000 | $ 178,317,000 | $ 182,589,000
Licensing agreement, initial term | 4 years |  |  |
Number of renewal options | option | 3 |  |  |
Licensing agreement, term | 7 years |  |  |
Maximum License costs over seven years |  | 2,300,000 |  |
Net prepaid expenses from excess of credits earned over credits used |  | 5,500,000 | 6,400,000 |
Accrued tool sets |  | 3,148,000 | 2,586,000 |
Liability to vendor for vouchers redeemed by students |  | $ 1,900,000 | 2,100,000 |
Maximum contribution per employee percentage of regular compensation |  | 75.00% |  |
Maximum contribution per employee percentage of incentive compensation |  | 100.00% |  |
Maximum contribution per non-employee percentage of cash compensation |  | 100.00% |  |
Deferred compensation contributions, vesting period |  | 5 years |  |
Obligation under the plan |  | $ 3,000,000.0 | 4,300,000 |
Cash surrender value of life insurance policies |  | 3,300,000 | 4,800,000 |
Minimum |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Annual payments |  | 1,000,000.0 |  |
Maximum |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Annual payments |  | 1,500,000 |  |
Surety Bond |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Debt instrument, face amount |  | 16,800,000 |  |
Licensing Agreement 1 |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Educational services and facilities |  | 500,000 | 600,000 | 700,000
Licensing Agreement 2 |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Educational services and facilities |  | 1,200,000 | 1,400,000 | 1,600,000
Required minimum royalty payment |  | 1,000,000.0 |  |
Licensing Agreement 3 |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Educational services and facilities |  | $ 100,000 | 100,000 | 100,000
Minimum notification of intent to terminate agreement |  | 90 days |  |
Licensing Agreement 4 |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Educational services and facilities |  | $ 300,000 | $ 200,000 | $ 400,000

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