Note 4 - Inventories (Detail) - Inventories Consisted of the Following: (USD $)	Jun. 30, 2012	Mar. 31, 2012
Aircraft parts and supplies	$ 119,638	$ 119,638
Ground equipment manufacturing:
Raw materials	10,791,070	9,127,113
Work in process	699,527	4,363,789
Finished goods	2,447,035	1,705,268
Total inventories	14,057,270	15,315,808
Reserves	(736,824)	(772,918)
Total, net of reserves	$ 13,320,446	$ 14,542,890