Note 4 - Inventories - Inventories (Details) - USD ($)	Mar. 31, 2016		Mar. 31, 2015
Ground support service parts	$ 1,566,694		$ 938,072
Inventory Gross	12,495,826		8,102,782
Reserves	(221,722)		(313,133)
Total, net of reserves	12,274,104	[1]	7,789,649
Printing Equipment and Maintenance [Member]
Raw materials	1,549,810		2,583,797
Work in process	408,213		1,535,152
Finished goods	4,328,812		3,045,761
Ground Equipment Manufacturing [Member]
Raw materials	3,319,939
Work in process	759,446
Finished goods	$ 562,912

[1] The Consolidated Balance Sheet as of March 31, 2016 has been restated. See Note 1A.