Note 6 - Inventories - Inventories (Details) - USD ($)	Dec. 31, 2016	Mar. 31, 2016
Ground support service parts	$ 2,498,473	$ 1,566,694
Inventory Gross	22,925,867	12,495,826
Reserves	(1,979,147)	(221,722)
Total, net of reserves	20,946,720	12,274,104
Ground Equipment Manufacturing [Member]
Raw materials	2,018,052	1,549,810
Work in process	1,692,322	408,213
Finished goods	9,396,326	4,328,812
Printing Equipment and Maintenance [Member]
Raw materials	2,326,857	3,319,939
Work in process	322,537	759,446
Finished goods	1,090,370	562,912
Commercial Jet Engines Inventory [Member]
Inventory Gross	$ 3,580,930

Inventory for ground support services parts

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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