Segment Information - Segment Data (Details) - USD ($)	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	$ 55,704,535	$ 60,867,469
Operating Income (Loss):	1,211,699	2,603,702
Capital Expenditures:	3,591,926	459,575
Depreciation, Amortization and Impairment:	2,033,286	1,495,401
Corporate and other
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	598,988	474,205
Operating Income (Loss):	(1,869,296)	(1,729,200)
Capital Expenditures:	60,224	77,230
Depreciation, Amortization and Impairment:	140,088	145,295
Intercompany
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	(1,127,411)	(1,141,536)
Operating Income (Loss):	19,788	5,804
Depreciation, Amortization and Impairment:	(1,325)	(1,325)
Air cargo
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	18,319,682	17,640,658
Air cargo | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	18,319,682	17,640,658
Operating Income (Loss):	47,918	1,056,692
Capital Expenditures:	8,288	5,996
Depreciation, Amortization and Impairment:	18,176	22,763
Ground equipment sales
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	12,248,891	6,384,781
Ground equipment sales | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	12,248,891	6,387,114
Operating Income (Loss):	1,347,378	393,500
Capital Expenditures:	10,402	140,090
Depreciation, Amortization and Impairment:	52,380	91,349
Ground equipment sales | Operating Segments | Domestic
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	10,858,891	5,292,017
Ground equipment sales | Operating Segments | International
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	1,390,000	1,095,097
Ground support services
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	8,516,800	9,047,640
Ground support services | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	8,516,800	9,047,640
Operating Income (Loss):	213,081	(87,724)
Capital Expenditures:	47,608	52,438
Depreciation, Amortization and Impairment:	86,252	125,055
Printing equipment and maintenance
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	64,270	298,823
Printing equipment and maintenance | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	67,870	302,713
Operating Income (Loss):	(456,199)	(318,278)
Capital Expenditures:	0	0
Depreciation, Amortization and Impairment:	2,225	14,331
Printing equipment and maintenance | Operating Segments | Domestic
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	21,684	194,792
Printing equipment and maintenance | Operating Segments | International
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	46,186	107,921
Commercial Jet Engines and Parts | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	17,079,715	28,156,675
Operating Income (Loss):	1,909,029	3,282,908
Capital Expenditures:	3,465,404	183,821
Depreciation, Amortization and Impairment:	1,735,490	1,097,933
Commercial Jet Engines and Parts | Operating Segments | Domestic
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	8,938,715	23,154,535
Commercial Jet Engines and Parts | Operating Segments | International
Segment Reporting Information [Line Items]
Operating Revenues by Segment:	$ 8,141,000	$ 5,002,140