Quarterly report pursuant to Section 13 or 15(d)

Leases - Supplemental Statement of Operations Information (Details)

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Leases - Supplemental Statement of Operations Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Finance lease expense:    
Net lease expense $ 1,160 $ 3,794
Marketing, general and administrative and engineering    
Lessee, Lease, Description [Line Items]    
Operating lease expense 860 2,627
Finance lease expense:    
Amortization of ROU assets 63 189
Short-term lease expense 225 940
Interest expense    
Finance lease expense:    
Interest expense on finance lease liabilities $ 12 $ 38