13. Significant Customer Concentrations (Tables)

12 Months Ended

Mar. 31, 2016

Risks and Uncertainties [Abstract]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

Net sales to foreign customers were $1,900,724 and $1,809,495 for the years ended March 31, 2016 and 2015, respectively. All other sales were to customers located in the U.S. The following table presents net sales by U.S. and foreign countries:

	2016		2015
United States	$	22,904,101	$	16,386,477
Foreign countries		1,900,724		1,809,495
Total Avionics Sales	$	24,804,825	$	18,195,972