Note 5 - Inventories (Tables)

3 Months Ended

Jun. 30, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	June 30, 2014			March 31, 2014
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