Note 16 - Segment Data (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Revenues:
Revenues	$ 112,181,158	$ 100,772,045
Operating Income (Loss):
Operating Income (Loss)	3,416,703	2,632,540
Capital Expenditures:
Capital Expenditures	1,931,781	1,283,168
Depreciation and Amortization:
Depreciation and amortization	856,911	752,412
Overnight Air Cargo [Member]
Operating Revenues:
Revenues	49,864,547	52,341,439
Operating Income (Loss):
Operating Income (Loss)	1,174,330	2,158,525
Capital Expenditures:
Capital Expenditures	245,548	119,559
Depreciation and Amortization:
Depreciation and amortization	158,179	166,796
Ground Equipment Sales [Member] | Domestic [Member]
Operating Revenues:
Revenues	33,231,529	25,928,216
Ground Equipment Sales [Member] | International [Member]
Operating Revenues:
Revenues	8,538,866	5,581,976
Ground Equipment Sales [Member]
Operating Revenues:
Revenues	41,770,395	31,510,192
Operating Income (Loss):
Operating Income (Loss)	4,283,683	2,397,357
Capital Expenditures:
Capital Expenditures	1,360,140	841,903
Depreciation and Amortization:
Depreciation and amortization	502,648	400,879
Ground Support Services [Member]
Operating Revenues:
Revenues	20,546,216	16,920,414
Operating Income (Loss):
Operating Income (Loss)	266,862	1,085,103
Capital Expenditures:
Capital Expenditures	256,918	289,598
Depreciation and Amortization:
Depreciation and amortization	167,743	134,663
Corporate Segment [Member]
Operating Income (Loss):
Operating Income (Loss)	(2,308,172)	(3,008,445)
Capital Expenditures:
Capital Expenditures	69,175	32,108
Depreciation and Amortization:
Depreciation and amortization	$ 28,340	$ 50,074