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
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-Topic 360
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Note 21 - Segment Information - Segment Data (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016
Revenues	$ 43,687,000	$ 35,769,000	$ 38,523,000	$ 30,493,000	$ 34,581,000	$ 46,619,000	$ 44,654,000	$ 22,359,000	$ 148,471,659	$ 148,211,938
Operating Income (Loss)	$ 1,311,000	$ 1,639,000	$ 1,022,000	$ (7,073,000)	$ (2,314,000)	$ 3,890,000	$ 5,505,000	$ (1,049,000)	(3,100,773)	6,031,663
Capital Expenditures									2,346,431	1,246,071
Depreciation and Amortization									3,181,845	1,257,207
Corporate, Non-Segment [Member]
Revenues									1,136,311	1,068,240
Operating Income (Loss)									(2,787,760)	(647,888)
Capital Expenditures									1,690,109	275,559
Depreciation and Amortization									174,510	53,060
Intersegment Eliminations [Member]
Revenues									(1,692,859)	(1,309,638)
Operating Income (Loss)									64,801	(90,427)
Capital Expenditures									(3,066,500)	(241,398)
Depreciation and Amortization									(194,610)
Overnight Air Cargo [Member]
Revenues									69,558,334	68,226,891
Overnight Air Cargo [Member] \| Operating Segments [Member]
Revenues									69,558,334	68,226,891
Operating Income (Loss)									2,723,933	3,283,495
Capital Expenditures									95,270	92,707
Depreciation and Amortization									124,793	138,639
Ground Equipment Sales [Member]
Revenues									31,447,408	51,175,818
Ground Equipment Sales [Member] \| Operating Segments [Member]
Revenues									31,206,009	51,417,216
Operating Income (Loss)									2,378,812	6,486,846
Capital Expenditures									21,766	341,124
Depreciation and Amortization									597,240	518,013
Ground Equipment Sales [Member] \| Operating Segments [Member] \| Domestic [Member]
Revenues									26,922,009	45,417,216
Ground Equipment Sales [Member] \| Operating Segments [Member] \| International [Member]
Revenues									4,284,000	6,000,000
Ground Support Services [Member]
Revenues									30,453,246	24,834,616
Ground Support Services [Member] \| Operating Segments [Member]
Revenues									30,453,246	24,834,616
Operating Income (Loss)									(500,712)	(1,035,929)
Capital Expenditures									465,718	520,243
Depreciation and Amortization									383,963	224,878
Printing Equipment and Maintenance [Member]
Revenues									9,019,155	3,954,797
Printing Equipment and Maintenance [Member] \| Operating Segments [Member]
Revenues									9,809,997	3,954,797
Operating Income (Loss)									(5,937,522)	(1,966,626)
Capital Expenditures									9,927	16,438
Depreciation and Amortization									1,738,819	313,893
Printing Equipment and Maintenance [Member] \| Operating Segments [Member] \| Domestic [Member]
Revenues									5,653,997	2,753,138
Printing Equipment and Maintenance [Member] \| Operating Segments [Member] \| International [Member]
Revenues									4,156,000	1,201,659
Commercial Jet Engines [Member] \| Operating Segments [Member]
Revenues									7,462,902
Operating Income (Loss)									534,762
Capital Expenditures									60,104
Depreciation and Amortization									109,807
Commercial Jet Engines [Member] \| Operating Segments [Member] \| Domestic [Member]
Revenues									2,688,902
Commercial Jet Engines [Member] \| Operating Segments [Member] \| International [Member]
Revenues									4,774,000
Leasing [Member]
Revenues									537,719	19,816
Leasing [Member] \| Operating Segments [Member]
Revenues									537,719	19,816
Operating Income (Loss)									422,913	2,192
Capital Expenditures									3,070,037	241,398
Depreciation and Amortization									$ 247,323	$ 8,724