Note 4 - Inventories (Details) - Inventory (USD $)	Dec. 31, 2013	Mar. 31, 2013
Inventory [Abstract]
Aircraft parts and supplies	$ 119,638	$ 119,638
Ground support service parts	591,101	327,753
Ground equipment manufacturing:
Raw materials	8,296,539	4,989,335
Work in process	1,707,354	1,305,029
Finished goods	1,899,336	2,230,100
Total inventories	12,613,968	8,971,855
Reserves	(838,641)	(790,155)
Total, net of reserves	$ 11,775,327	$ 8,181,700