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Leases (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2020
Oct. 01, 2019
Sep. 30, 2019
 [1]
Leases [Abstract]        
Operating lease right-of-use (ROU) assets $ 2,759 $ 2,759 $ 2,890 $ 0
Operating lease cost 83 166    
Short-term lease cost 0 0    
Total lease cost 83 166    
Operating cash flows from operating leases $ 80 $ 158    
Weighted average remaining lease term-operating leases 9 years 8 months 6 days 9 years 8 months 6 days    
Weighted average discount rate-operating leases 2.22% 2.22%    
[1] Derived from audited consolidated financial statements.