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Note 8 - Segment Information (Details) - Schedule of Segment Reporting Information, by Segment - USD ($)
3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Segment Reporting Information [Line Items]    
Net sales $ 5,342,369 $ 5,845,919
Cost of sales 3,465,716 4,030,624
Gross margin 1,876,653 1,815,295
Engineering, research, and development 584,877 492,132
Selling, general and administrative 911,744 865,688
Amortization of deferred financing costs 1,356 1,357
Change in fair value of common stock warrants (217,203) (67,760)
Interest (income) expense, net 17,826 29,634
Total expenses 1,298,600 1,321,051
Income (loss) before income taxes 578,053 494,244
Avionics Government [Member]    
Segment Reporting Information [Line Items]    
Net sales 4,871,620 5,261,319
Cost of sales 3,104,918 3,561,594
Gross margin 1,766,702 1,699,725
Avionics Commercial [Member]    
Segment Reporting Information [Line Items]    
Net sales 470,749 584,600
Cost of sales 360,798 469,030
Gross margin 109,951 115,570
Avionics Total [Member]    
Segment Reporting Information [Line Items]    
Net sales 5,342,369 5,845,919
Cost of sales 3,465,716 4,030,624
Gross margin 1,876,653 1,815,295
Engineering, research, and development 584,877 492,132
Selling, general and administrative 343,882 360,629
Amortization of deferred financing costs 0 0
Change in fair value of common stock warrants 0 0
Interest (income) expense, net 0 0
Total expenses 928,759 852,761
Income (loss) before income taxes 947,894 962,534
Corporate Segment [Member]    
Segment Reporting Information [Line Items]    
Net sales 0 0
Cost of sales 0 0
Gross margin 0 0
Engineering, research, and development 0 0
Selling, general and administrative 567,862 505,059
Amortization of deferred financing costs 1,356 1,357
Change in fair value of common stock warrants (217,203) (67,760)
Interest (income) expense, net 17,826 29,634
Total expenses 369,841 468,290
Income (loss) before income taxes $ (369,841) $ (468,290)