Note 7 - Segment Information (Details) - Segment Data (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating Revenues:
Overnight Air Cargo	$ 12,121,175	$ 12,051,201	$ 24,529,364	$ 22,784,927
Ground Equipment Sales:
Ground Equipment Sales	7,907,333	6,085,616	13,143,896	16,829,177
Ground Support Services	4,161,584	3,025,243	7,796,886	6,036,121
Total	24,190,092	21,162,060	45,470,146	45,650,225
Operating Income (Loss):
Operating Income/Loss	752,492	350,934	972,950	1,004,604
Capital Expenditures:
Overnight Air Cargo	4,618,716	4,939,237	9,404,399	9,399,631
Ground Equipment Sales	6,414,360	5,117,938	10,649,267	14,529,220
Ground Support Services	3,348,808	2,576,779	6,280,117	5,054,949
Total	46,860	90,112	144,275	220,606
Depreciation and Amortization:
Depreciation and Amortization	181,353	118,566	325,654	243,247
Domestic [Member]
Ground Equipment Sales:
Ground Equipment Sales	7,373,315	4,386,908	12,374,186	13,551,325
International [Member]
Ground Equipment Sales:
Ground Equipment Sales	534,018	1,698,708	769,710	3,277,852
Overnight Air Cargo [Member]
Operating Income (Loss):
Operating Income/Loss	564,969	863,893	1,237,216	1,618,734
Capital Expenditures:
Overnight Air Cargo	12,236	16,593	12,236	49,495
Depreciation and Amortization:
Depreciation and Amortization	42,444	38,444	84,832	75,890
Ground Equipment Sales [Member]
Operating Income (Loss):
Operating Income/Loss	452,702	(163,765)	458,913	140,743
Capital Expenditures:
Ground Equipment Sales	2,025	53,281	18,104	111,651
Depreciation and Amortization:
Depreciation and Amortization	91,594	33,696	147,534	70,929
Ground Support Services [Member]
Operating Income (Loss):
Operating Income/Loss	307,448	52,028	557,615	222,290
Capital Expenditures:
Ground Support Services	26,416	16,038	101,820	16,038
Depreciation and Amortization:
Depreciation and Amortization	33,856	33,465	66,294	66,917
Corporate Division [Member]
Operating Income (Loss):
Operating Income/Loss	(572,627)	(401,222)	(1,280,794)	(977,163)
Capital Expenditures:
Corporate	6,183	4,200	12,115	43,422
Depreciation and Amortization:
Depreciation and Amortization	$ 13,459	$ 12,961	$ 26,994	$ 29,511