Note 5 - Inventories (Tables)

3 Months Ended

Jun. 30, 2015

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	June 30, 2015			March 31, 2015
Ground support service parts	$	972,949		$	938,072
Ground equipment manufacturing:
Raw materials		3,261,794			2,583,797
Work in process		1,654,867			1,535,152
Finished goods		5,942,274			3,045,761
Total inventories		11,831,884			8,102,782
Reserves		(332,182	)		(313,133	)
Total, net of reserves	$	11,499,702		$	7,789,649