Note 4 - Inventories (Details) - Inventory (USD $)	Mar. 31, 2014	Mar. 31, 2013
Inventory [Abstract]
Aircraft parts and supplies	$ 119,638	$ 119,638
Ground support service parts	608,674	327,753
Ground equipment manufacturing:
Raw materials	6,965,659	4,989,335
Work in process	1,814,791	1,305,029
Finished goods	3,486,269	2,230,100
Total inventories	12,995,031	8,971,855
Reserves	(755,562)	(790,155)
Total, net of reserves	$ 12,239,469	$ 8,181,700