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Leases (Schedule of operating lease liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Mar. 31, 2019
Lease payments due    
Less than 1 year $ 1,841  
1-2 years 1,658  
2-3 years 1,505  
3-4 years 578  
4-5 years 507  
Over 5 years 2,407  
Total undiscounted cash flows 8,496  
Discount on cash flows 1,350  
Total lease liability $ 7,146 $ 7,590