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Inventories - Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Mar. 31, 2019
Printing equipment and maintenance    
Commercial jet engines and parts $ 32,133 $ 21,032
Total inventories 40,544 27,612
Reserves (174) (157)
Total inventories, net of reserves 40,370 27,455
Ground equipment manufacturing:    
Ground equipment manufacturing    
Raw materials 4,191 2,498
Work in process 910 1,660
Finished goods 1,922 973
Printing equipment and maintenance    
Raw materials 4,191 2,498
Finished goods 1,922 973
Printing equipment and maintenance    
Ground equipment manufacturing    
Raw materials 476 401
Finished goods 912 1,048
Printing equipment and maintenance    
Raw materials 476 401
Finished goods $ 912 $ 1,048