Note 8 - Segment Information (Detail) - Schedule of segment reporting, by segment (USD $)	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Net sales	$ 1,177,288	$ 3,990,211
Cost of Sales	893,594	2,128,580
Gross Margin	283,694	1,861,631
Engineering, research, and development	578,604	849,038
Selling, general, and admin.	653,888	798,822
Amortization of debt discount	13,392	13,395
Amortization of debt expense	27,080	27,080
Change in fair value of common stock warrants	(249,394)	168,586
Proceeds from life insurance		(300,029)
Interest (income) expense, net	92,467	102,601
Total expenses	1,116,038	1,659,493
Income (loss) before income taxes	(832,344)	202,138
Avionics Gov't [Member]
Net sales	549,966	3,145,592
Cost of Sales	315,929	1,674,813
Gross Margin	234,037	1,470,779
Engineering, research, and development		0
Selling, general, and admin.	0	0
Amortization of debt discount	0	0
Amortization of debt expense	0	0
Change in fair value of common stock warrants	0	0
Proceeds from life insurance		0
Interest (income) expense, net	0	0
Total expenses	0	0
Income (loss) before income taxes	0	0
Avionics Comm'l. [Member]
Net sales	627,322	844,619
Cost of Sales	577,665	453,767
Gross Margin	49,657	390,852
Engineering, research, and development		0
Selling, general, and admin.	0	0
Amortization of debt discount	0	0
Amortization of debt expense	0	0
Change in fair value of common stock warrants	0	0
Proceeds from life insurance		0
Interest (income) expense, net	0	0
Total expenses	0	0
Income (loss) before income taxes	0	0
Avionics Total [Member]
Net sales	1,177,288	3,990,211
Cost of Sales	893,594	2,128,580
Gross Margin	283,694	1,861,631
Engineering, research, and development	578,604	849,038
Selling, general, and admin.	316,989	361,816
Amortization of debt discount	0	0
Amortization of debt expense	0	0
Change in fair value of common stock warrants	0	0
Proceeds from life insurance		0
Interest (income) expense, net	0	0
Total expenses	895,593	1,210,854
Income (loss) before income taxes	(611,899)	650,777
Corporate [Member]
Net sales	0	0
Cost of Sales	0	0
Gross Margin	0	0
Engineering, research, and development		0
Selling, general, and admin.	336,899	437,006
Amortization of debt discount	13,392	13,395
Amortization of debt expense	27,080	27,080
Change in fair value of common stock warrants	(249,394)	168,586
Proceeds from life insurance		(300,029)
Interest (income) expense, net	92,468	102,601
Total expenses	220,445	448,639
Income (loss) before income taxes	$ (220,445)	$ (448,639)