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Inventories - Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Mar. 31, 2019
Printing equipment and maintenance    
Commercial jet engines and parts $ 58,605 $ 21,032
Total inventories 68,202 27,612
Reserves (86) (157)
Total inventories, net of reserves 68,116 27,455
Ground equipment manufacturing:    
Ground equipment manufacturing    
Raw materials 5,413 2,498
Work in process 2,302 1,660
Finished goods 473 973
Printing equipment and maintenance    
Raw materials 5,413 2,498
Finished goods 473 973
Printing equipment and maintenance    
Ground equipment manufacturing    
Raw materials 498 401
Finished goods 911 1,048
Printing equipment and maintenance    
Raw materials 498 401
Finished goods $ 911 $ 1,048