Note 12 - Segment Information - Segment Data (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 35,769,170	$ 46,618,573	$ 104,785,413	$ 113,631,022
Operating Income (Loss)	1,639,417	3,890,117	(4,412,326)	8,345,668
Capital Expenditures	606,967	537,622	1,518,007	1,051,055
Depreciation and Amortization	411,798	296,474	2,755,071	667,595
Corporate, Non-Segment [Member]
Revenues	281,926	265,837	845,778	796,884
Operating Income (Loss)	(453,577)	(2,686)	(1,917,110)	(169,617)
Capital Expenditures	393,890	190,733	1,027,228	200,666
Depreciation and Amortization	49,390	13,817	116,175	28,214
Intersegment Eliminations [Member]
Revenues	2,339,973	(362,396)	(1,311,221)	(893,443)
Operating Income (Loss)	556,268	(95,096)	38,478	(95,096)
Capital Expenditures		(241,398)	(3,066,500)	(241,398)
Depreciation and Amortization	(171,734)	(1,463)	(193,284)	(1,463)
Overnight Air Cargo [Member]
Revenues	17,099,640	18,674,458	50,888,019	48,949,401
Overnight Air Cargo [Member] | Operating Segments [Member]
Revenues	17,099,640	18,674,458	50,888,019	48,949,401
Operating Income (Loss)	716,356	1,099,335	2,136,337	2,484,097
Capital Expenditures	43,542	6,618	79,582	82,607
Depreciation and Amortization	31,866	37,068	91,175	106,161
Ground Equipment Sales [Member]
Revenues	5,400,258	20,344,287	20,743,323	45,666,664
Ground Equipment Sales [Member] | Operating Segments [Member]
Revenues	2,742,360	20,440,846	20,501,925	45,763,223
Operating Income (Loss)	(912,893)	3,841,378	672,464	7,685,291
Capital Expenditures		119,455	19,596	338,194
Depreciation and Amortization	359,021	165,401	453,941	364,465
Ground Equipment Sales [Member] | Operating Segments [Member] | Domestic [Member]
Revenues	781,519	19,120,611	16,472,690	41,261,674
Ground Equipment Sales [Member] | Operating Segments [Member] | International [Member]
Revenues	1,960,841	1,320,235	4,029,235	4,501,549
Ground Support Services [Member]
Revenues	7,579,661	6,559,110	21,417,854	17,974,239
Ground Support Services [Member] | Operating Segments [Member]
Revenues	7,579,661	6,559,110	21,417,854	17,974,239
Operating Income (Loss)	(41,199)	(69,620)	(391,968)	(675,813)
Capital Expenditures	119,381	220,816	331,520	429,588
Depreciation and Amortization	103,600	60,993	274,309	149,560
Printing Equipment and Maintenance [Member]
Revenues	2,653,899	1,035,000	6,941,883	1,035,000
Printing Equipment and Maintenance [Member] | Operating Segments [Member]
Revenues	2,689,898	1,035,000	7,648,724	1,035,000
Operating Income (Loss)	1,056,972	(883,000)	(5,890,238)	(883,000)
Capital Expenditures			9,927
Depreciation and Amortization	(13,082)	17,000	1,713,322	17,000
Printing Equipment and Maintenance [Member] | Operating Segments [Member] | Domestic [Member]
Revenues	2,151,030	789,000	5,400,433	789,000
Printing Equipment and Maintenance [Member] | Operating Segments [Member] | International [Member]
Revenues	538,868	246,000	2,248,291	246,000
Commercial Jet Engines [Member]
Revenues	2,998,165		4,293,272
Commercial Jet Engines [Member] | Operating Segments [Member]
Revenues	2,998,165		4,293,272
Operating Income (Loss)	491,479		534,285
Capital Expenditures	50,154		50,154
Depreciation and Amortization	38,221		66,627
Commercial Jet Engines [Member] | Operating Segments [Member] | Domestic [Member]
Revenues	1,558,983		2,009,171
Commercial Jet Engines [Member] | Operating Segments [Member] | International [Member]
Revenues	1,439,182		2,284,101
Leasing [Member]
Revenues	37,547	5,718	501,062	5,718
Depreciation and Amortization	14,516	3,658	232,806	3,658
Leasing [Member] | Operating Segments [Member]
Revenues	37,547	5,718	501,062	5,718
Operating Income (Loss)	226,011	(194)	405,426	(194)
Capital Expenditures		$ 241,398	$ 3,066,500	$ 241,398