Revenue Recognition - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Total	$ 35,604	$ 50,693	$ 72,576	$ 97,881
Air Cargo
Disaggregation of Revenue [Line Items]
Total	17,295	19,745	33,466	38,064
Air Cargo | Product Sales
Disaggregation of Revenue [Line Items]
Total	5,728	6,680	10,043	12,094
Air Cargo | Support Services
Disaggregation of Revenue [Line Items]
Total	11,558	13,033	23,408	25,927
Air Cargo | Leasing Revenue
Disaggregation of Revenue [Line Items]
Total	0	0	0	0
Air Cargo | Other
Disaggregation of Revenue [Line Items]
Total	9	32	15	43
Ground equipment sales
Disaggregation of Revenue [Line Items]
Total	12,060	12,741	27,888	24,991
Ground equipment sales | Product Sales
Disaggregation of Revenue [Line Items]
Total	11,833	12,489	27,571	24,492
Ground equipment sales | Support Services
Disaggregation of Revenue [Line Items]
Total	67	105	84	210
Ground equipment sales | Leasing Revenue
Disaggregation of Revenue [Line Items]
Total	23	33	71	53
Ground equipment sales | Other
Disaggregation of Revenue [Line Items]
Total	137	114	162	236
Commercial jet engines and parts
Disaggregation of Revenue [Line Items]
Total	6,114	17,801	10,808	34,128
Commercial jet engines and parts | Product Sales
Disaggregation of Revenue [Line Items]
Total	4,283	13,218	6,979	24,388
Commercial jet engines and parts | Support Services
Disaggregation of Revenue [Line Items]
Total	956	1,597	2,580	3,007
Commercial jet engines and parts | Leasing Revenue
Disaggregation of Revenue [Line Items]
Total	791	2,941	1,164	6,655
Commercial jet engines and parts | Other
Disaggregation of Revenue [Line Items]
Total	84	45	85	78
Corporate and other
Disaggregation of Revenue [Line Items]
Total	135	406	414	698
Corporate and other | Product Sales
Disaggregation of Revenue [Line Items]
Total	0	20	33	68
Corporate and other | Support Services
Disaggregation of Revenue [Line Items]
Total	6	217	24	269
Corporate and other | Leasing Revenue
Disaggregation of Revenue [Line Items]
Total	107	36	142	81
Corporate and other | Other
Disaggregation of Revenue [Line Items]
Total	$ 22	$ 133	$ 215	$ 280