Note 11 - Segment Information (Details) - Schedule of Segment Reporting Information, by Segment - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 1,814,214	$ 3,542,077
Cost of sales	1,332,901	2,300,787
Gross margin	481,313	1,241,290
Engineering, research, and development	517,323	615,273
Selling, general and administrative	566,525	706,286
Litigation costs	39,271	382,512
Amortization of deferred financing costs	0	1,357
Change in fair value of common stock warrants	0	(95,000)
Proceeds from life insurance	0	(92,678)
Interest income	(998)	0
Interest expense - judgment	71,220	0
Interest expense, net	34,045	9,631
Total expenses	1,227,386	1,527,381
Income (loss) before income taxes	(746,073)	(286,091)
Avionics Government [Member]
Segment Reporting Information [Line Items]
Net sales	1,092,582	2,972,326
Cost of sales	761,254	1,815,153
Gross margin	331,328	1,157,173
Avionics Commercial [Member]
Segment Reporting Information [Line Items]
Net sales	721,632	569,751
Cost of sales	571,647	485,634
Gross margin	149,985	84,117
Avionics Total [Member]
Segment Reporting Information [Line Items]
Net sales	1,814,214	3,542,077
Cost of sales	1,332,901	2,300,787
Gross margin	481,313	1,241,290
Engineering, research, and development	517,323	615,273
Selling, general and administrative	217,128	358,667
Amortization of deferred financing costs		0
Change in fair value of common stock warrants		0
Interest expense, net	0	0
Total expenses	734,451	973,940
Income (loss) before income taxes	(253,138)	267,350
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	349,397	347,619
Litigation costs	39,271	382,512
Amortization of deferred financing costs		1,357
Change in fair value of common stock warrants		(95,000)
Proceeds from life insurance		(92,678)
Interest income	(998)
Interest expense - judgment	71,220
Interest expense, net	34,045	9,631
Total expenses	492,935	553,441
Income (loss) before income taxes	$ (492,935)	$ (553,441)