Revenue Recognition - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total	$ 73,300	$ 55,486	$ 171,181	$ 148,173
Air Cargo
Disaggregation of Revenue [Line Items]
Total	18,706	17,868	56,771	52,573
Air Cargo | Product Sales
Disaggregation of Revenue [Line Items]
Total	6,014	5,694	18,108	16,217
Air Cargo | Support Services
Disaggregation of Revenue [Line Items]
Total	12,644	12,164	38,572	36,245
Air Cargo | Leased Assets
Disaggregation of Revenue [Line Items]
Total	0	0	0	0
Air Cargo | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	48	10	91	111
Ground equipment sales
Disaggregation of Revenue [Line Items]
Total	15,949	16,278	40,939	35,502
Ground equipment sales | Product Sales
Disaggregation of Revenue [Line Items]
Total	15,640	15,902	40,132	34,519
Ground equipment sales | Support Services
Disaggregation of Revenue [Line Items]
Total	161	260	370	509
Ground equipment sales | Leased Assets
Disaggregation of Revenue [Line Items]
Total	58	16	111	62
Ground equipment sales | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	90	100	326	412
Commercial jet engines and parts
Disaggregation of Revenue [Line Items]
Total	38,536	20,990	72,665	58,953
Commercial jet engines and parts | Product Sales
Disaggregation of Revenue [Line Items]
Total	35,463	15,957	59,851	48,366
Commercial jet engines and parts | Support Services
Disaggregation of Revenue [Line Items]
Total	797	1,309	3,804	3,602
Commercial jet engines and parts | Leased Assets
Disaggregation of Revenue [Line Items]
Total	2,245	3,663	8,901	6,691
Commercial jet engines and parts | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	31	61	109	294
Printing equipment and maintenance
Disaggregation of Revenue [Line Items]
Total	82	105	396	544
Printing equipment and maintenance | Product Sales
Disaggregation of Revenue [Line Items]
Total	3	88	72	497
Printing equipment and maintenance | Support Services
Disaggregation of Revenue [Line Items]
Total	79	13	314	33
Printing equipment and maintenance | Leased Assets
Disaggregation of Revenue [Line Items]
Total	0	0	0	0
Printing equipment and maintenance | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	0	4	10	14
Corporate and other
Disaggregation of Revenue [Line Items]
Total	27	245	410	601
Corporate and other | Product Sales
Disaggregation of Revenue [Line Items]
Total	0	0	0	0
Corporate and other | Support Services
Disaggregation of Revenue [Line Items]
Total	37	45	69	61
Corporate and other | Leased Assets
Disaggregation of Revenue [Line Items]
Total	36	49	117	121
Corporate and other | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	$ (46)	$ 151	$ 224	$ 419