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Lease Liabilities - Maturities (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Sep. 30, 2019
Operating Leases
2019		$ 1,358
2020		5,755
2021		5,826
2022		5,898
2023		5,972
Thereafter		23,102
Total undiscounted lease payments		47,911
Less interest		18,742
Lease liabilities		29,169
Finance Leases
2019		342
2020		1,248
2021		889
2022		296
2023		95
Total undiscounted lease payments		2,870
Less interest		330
Lease liabilities		2,540
Additional office space
Operating Leases
Lease liabilities		$ 3,700
Additional office and laboratory space
Operating Leases
Lease liabilities	$ 3,900

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