Note 11 - Segment Information - Segment Data (Details) - USD ($)	3 Months Ended
Jun. 30, 2017	Jun. 30, 2016
Revenues	$ 47,697,373	$ 30,493,253
Operating Income (Loss)	2,212,568	(7,073,482)
Capital Expenditures	489,995	519,569
Depreciation and Amortization	398,827	605,081
Corporate, Non-Segment [Member]
Revenues	290,532	281,926
Operating Income (Loss)	(869,916)	(931,837)
Capital Expenditures	459,653	388,635
Depreciation and Amortization	59,347	30,743
Intersegment Eliminations [Member]
Revenues	(291,532)	(3,348,426)
Operating Income (Loss)	1,326	(524,989)
Capital Expenditures		(3,066,500)
Depreciation and Amortization	(1,326)	(14,351)
Overnight Air Cargo [Member]
Revenues	16,742,175	16,637,165
Overnight Air Cargo [Member] \| Operating Segments [Member]
Revenues	16,742,175	16,637,165
Operating Income (Loss)	816,666	979,177
Capital Expenditures
Depreciation and Amortization	31,016	29,209
Ground Equipment Sales [Member]
Revenues	5,949,656	4,254,188
Ground Equipment Sales [Member] \| Operating Segments [Member]
Revenues	5,949,656	6,670,688
Operating Income (Loss)	165,794	342,320
Capital Expenditures		19,596
Depreciation and Amortization	132,880	47,594
Ground Equipment Sales [Member] \| Operating Segments [Member] \| Domestic [Member]
Revenues	5,276,366	5,386,069
Ground Equipment Sales [Member] \| Operating Segments [Member] \| International [Member]
Revenues	673,290	1,284,619
Ground Support Services [Member]
Revenues	9,113,073	6,800,042
Ground Support Services [Member] \| Operating Segments [Member]
Revenues	9,113,073	6,800,042
Operating Income (Loss)	356,824	(110,052)
Capital Expenditures	25,365	101,411
Depreciation and Amortization	111,631	83,436
Printing Equipment and Maintenance [Member]
Revenues	3,131,381	2,560,088
Printing Equipment and Maintenance [Member] \| Operating Segments [Member]
Revenues	3,131,381	3,210,088
Operating Income (Loss)	924,036	(6,935,359)
Capital Expenditures		9,927
Depreciation and Amortization	4,691	296,081
Printing Equipment and Maintenance [Member] \| Operating Segments [Member] \| Domestic [Member]
Revenues	1,443,982	2,232,706
Printing Equipment and Maintenance [Member] \| Operating Segments [Member] \| International [Member]
Revenues	1,687,399	977,382
Commercial Jet Engines [Member] \| Operating Segments [Member]
Revenues	12,726,341
Operating Income (Loss)	810,940
Capital Expenditures	4,977
Depreciation and Amortization	45,776
Commercial Jet Engines [Member] \| Operating Segments [Member] \| Domestic [Member]
Revenues	8,190,885
Commercial Jet Engines [Member] \| Operating Segments [Member] \| International [Member]
Revenues	4,535,456
Leasing [Member]
Revenues	35,747	241,770
Leasing [Member] \| Operating Segments [Member]
Revenues	35,747	241,770
Operating Income (Loss)	6,898	107,258
Capital Expenditures		3,066,500
Depreciation and Amortization	$ 14,812	$ 132,369

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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