Significant Customer Concentrations (Tables)

12 Months Ended

Mar. 31, 2020

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

Net sales to foreign customers, which, for the most part, are international distributors were $8,569,347 and $2,438,228 for the years ended March 31, 2020 and 2019, respectively. All other sales were to customers located in the U.S. The following table presents net sales by U.S. and foreign countries:

	2020		2019
United States	$	7,205,596	$	9,677,822
Foreign countries		8,569,347		2,438,228
Total Avionics Sales	$	15,774,943	$	12,116,050