Revenue Recognition - Disaggregation of Revenues (Details) - USD ($)	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total	$ 55,704,535	$ 60,867,469
Air cargo
Disaggregation of Revenue [Line Items]
Total	18,319,682	17,640,658
Air cargo | Product Sales
Disaggregation of Revenue [Line Items]
Total	5,414,377	5,519,611
Air cargo | Support Services
Disaggregation of Revenue [Line Items]
Total	12,894,182	12,096,874
Air cargo | Leased Assets
Disaggregation of Revenue [Line Items]
Total	0	0
Air cargo | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	11,123	24,174
Ground equipment sales
Disaggregation of Revenue [Line Items]
Total	12,248,891	6,384,781
Ground equipment sales | Product Sales
Disaggregation of Revenue [Line Items]
Total	12,002,366	6,169,103
Ground equipment sales | Support Services
Disaggregation of Revenue [Line Items]
Total	104,545	100,592
Ground equipment sales | Leased Assets
Disaggregation of Revenue [Line Items]
Total	20,357	31,002
Ground equipment sales | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	121,623	84,084
Ground support services
Disaggregation of Revenue [Line Items]
Total	8,516,800	9,047,640
Ground support services | Product Sales
Disaggregation of Revenue [Line Items]
Total	2,266,859	2,422,581
Ground support services | Support Services
Disaggregation of Revenue [Line Items]
Total	6,213,354	6,605,265
Ground support services | Leased Assets
Disaggregation of Revenue [Line Items]
Total	0	0
Ground support services | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	36,588	19,795
Commercial jet engines and parts
Disaggregation of Revenue [Line Items]
Total	16,326,905	27,320,175
Commercial jet engines and parts | Product Sales
Disaggregation of Revenue [Line Items]
Total	11,170,632	25,029,114
Commercial jet engines and parts | Support Services
Disaggregation of Revenue [Line Items]
Total	1,410,027	965,826
Commercial jet engines and parts | Leased Assets
Disaggregation of Revenue [Line Items]
Total	3,714,048	1,201,510
Commercial jet engines and parts | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	32,197	123,724
Printing equipment and maintenance
Disaggregation of Revenue [Line Items]
Total	64,270	298,823
Printing equipment and maintenance | Product Sales
Disaggregation of Revenue [Line Items]
Total	48,440	286,642
Printing equipment and maintenance | Support Services
Disaggregation of Revenue [Line Items]
Total	10,745	7,658
Printing equipment and maintenance | Leased Assets
Disaggregation of Revenue [Line Items]
Total	0	0
Printing equipment and maintenance | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	5,085	4,523
Corporate and other
Disaggregation of Revenue [Line Items]
Total	227,987	175,392
Corporate and other | Product Sales
Disaggregation of Revenue [Line Items]
Total	0	0
Corporate and other | Support Services
Disaggregation of Revenue [Line Items]
Total	40,552	0
Corporate and other | Leased Assets
Disaggregation of Revenue [Line Items]
Total	45,418	40,067
Corporate and other | Product and Service, Other
Disaggregation of Revenue [Line Items]
Total	$ 142,017	$ 135,324