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Leases - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Oct. 01, 2019 | Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Operating leases right-of-use assets |  | $ 22,276 |  |  |
Operating lease liabilities - current |  | 1,768 |  |  |
Operating lease liabilities - long-term |  | 21,686 |  |  |
Accumulated deficit |  | 33,805 |  |  | $ 39,555
Gain recognized on lease modification |  | 121 | $ 0 |  |
Operating lease liability |  | 23,454 |  |  |
Increase to right-of-use assets |  | 24,700 |  |  |
Increase to lease liabilities |  | $ 25,200 |  |  |
Facilities and Equipment | Minimum |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Remaining lease term |  | 9 months 18 days |  |  |
Facilities and Equipment | Maximum |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Remaining lease term |  | 10 years 9 months 18 days |  |  |
Lease Modification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Operating leases right-of-use assets |  | $ 7,300 |  |  |
Gain recognized on lease modification | $ 100 |  |  |  |
Operating lease liability |  | $ 7,200 |  |  |
Cumulative-effect adjustment for adoption of ASC 842 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Operating leases right-of-use assets |  |  |  | $ 17,398 |
Operating lease liabilities - current |  |  |  | 3,645 |
Operating lease liabilities - long-term |  |  |  | 14,372 |
Accumulated deficit |  |  |  | 2 |
ASC 842 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Operating leases right-of-use assets |  |  |  | 17,400 |
Operating lease liability |  |  |  | $ 18,000 |

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