Note 6 - Inventories (Details) - USD ($)	Dec. 31, 2015		Mar. 31, 2015
Printing Equipment and Maintenance [Member]
Raw materials	$ 3,702,883
Work in process	354,408
Finished goods	937,166
Ground Equipment Manufacturing [Member]
Raw materials	2,270,630		$ 2,583,797
Work in process	964,274		1,535,152
Finished goods	2,117,512		3,045,761
Ground support service parts	1,529,931		938,072
Total inventories	11,876,804		8,102,782
Reserves	(319,212)		(313,133)
Total inventories, net	$ 11,557,592	[1]	$ 7,789,649

[1] Includes VIE assets of $8,015,000 and VIE liabilities of $3,617,000 - Note 9