Note 5 - Inventories (Details) - Inventory (USD $)	Jun. 30, 2014	Mar. 31, 2014
Inventory [Abstract]
Aircraft parts and supplies	$ 119,638	$ 119,638
Ground support service parts	697,463	608,674
Ground equipment manufacturing:
Raw materials	7,809,350	6,965,659
Work in process	3,547,697	1,814,791
Finished goods	3,424,635	3,486,269
Total inventories	15,598,783	12,995,031
Reserves	(563,543)	(755,562)
Total, net of reserves	$ 15,035,240	$ 12,239,469