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Leases, Cost Recogized in Consolidated Statement of Operations (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Lease cost [Abstract]    
Operating lease cost $ 1,987,000 $ 3,885,000
Short-term lease cost 295,000 698,000
Variable lease cost 157,000 287,000
Finance lease cost: [Abstract]    
Amortization of finance lease assets 372,000 730,000
Interest on finance lease liabilities 73,000 141,000
Total lease cost $ 2,884,000 $ 5,741,000