Note 6 - Inventories - Inventories (Details) - USD ($)	Jun. 30, 2016	Mar. 31, 2016
Ground support service parts	$ 2,065,265	$ 1,566,694
Inventory Gross	17,856,276	12,495,826
Reserves	(2,656,560)	(221,722)
Total, net of reserves	15,199,716	12,274,104	[1]
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

[1] Derived from audited financial statements