Note 5 - Inventories (Details) - Inventory (USD $)	Sep. 30, 2014	Mar. 31, 2014
Inventory [Abstract]
Aircraft parts and supplies		$ 119,638
Ground support service parts	702,581	608,674
Ground equipment manufacturing:
Raw materials	5,951,918	6,965,659
Work in process	2,072,999	1,814,791
Finished goods	629,003	3,486,269
Total inventories	9,356,501	12,995,031
Reserves	(438,380)	(755,562)
Total, net of reserves	$ 8,918,121	$ 12,239,469