Note 7 - Segment Information (Detail) - Segment Data is Summarized as Follows: (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Operating Revenues:
Overnight Air Cargo	$ 12,416,819	$ 12,062,070	$ 35,201,746	$ 35,228,575
Ground Equipment Sales:
Ground Equipment Sales	10,945,263	10,940,354	27,774,440	26,285,380
Ground Support Services	3,341,186	2,647,621	9,377,307	6,158,505
Total	26,703,268	25,650,045	72,353,493	67,672,460
Operating Income (Loss):
Operating Income/Loss	986,542	901,304	1,991,146	2,070,235
Capital Expenditures:
Overnight Air Cargo	5,139,155	4,947,424	14,538,786	14,369,938
Ground Equipment Sales	9,344,448	9,526,057	23,909,201	22,985,652
Ground Support Services	2,220,193	1,783,466	6,743,992	4,199,530
Total	71,907	144,063	292,513	749,772
Depreciation and Amortization:
Depreciation and Amortization	105,129	74,992	312,843	191,703
Domestic [Member]
Ground Equipment Sales:
Ground Equipment Sales	7,802,351	8,199,056	21,353,676	20,351,838
International [Member]
Ground Equipment Sales:
Ground Equipment Sales	3,142,912	2,741,298	6,420,764	5,933,542
Overnight Air Cargo [Member]
Operating Income (Loss):
Operating Income/Loss	707,561	830,631	2,326,295	2,744,009
Capital Expenditures:
Overnight Air Cargo	36,156	90,519	85,651	520,636
Depreciation and Amortization:
Depreciation and Amortization	38,815	23,289	114,705	51,779
Ground Equipment Sales [Member]
Operating Income (Loss):
Operating Income/Loss	441,346	160,615	582,089	68,201
Capital Expenditures:
Ground Equipment Sales	16,508	13,730	128,159	36,320
Depreciation and Amortization:
Depreciation and Amortization	20,500	12,843	55,896	33,251
Ground Support Services [Member]
Operating Income (Loss):
Operating Income/Loss	407,954	335,982	630,244	530,388
Capital Expenditures:
Ground Support Services	15,335	32,590	31,373	183,492
Depreciation and Amortization:
Depreciation and Amortization	32,820	26,950	99,737	77,760
Corporate Division [Member]
Operating Income (Loss):
Operating Income/Loss	(570,319)	(425,924)	(1,547,482)	(1,272,363)
Capital Expenditures:
Corporate	3,908	7,224	47,330	9,324
Depreciation and Amortization:
Depreciation and Amortization	$ 12,994	$ 11,910	$ 42,505	$ 28,913