Note 6 - Inventories (Details) - USD ($)	Jun. 30, 2016	Mar. 31, 2016
Ground Equipment Manufacturing [Member]
Raw materials	$ 2,138,404	$ 1,549,810
Work in process	1,497,213	408,213
Finished goods	6,885,948	4,328,812
Printing Equipment and Maintenance [Member]
Raw materials	3,561,714	3,319,939
Work in process	792,212	759,446
Finished goods	915,520	562,912
Ground support service parts	2,065,265	1,566,694
Total inventories	17,856,276	12,495,826
Reserves	(2,656,560)	(221,722)
Total, net of reserves	$ 15,199,716	$ 12,274,104