Inventories, net (Tables)

3 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of:

	June 30, 2020			March 31, 2020
Purchased parts	$	2,700,907		$	3,011,072
Work-in-process		1,281,839			597,166
Finished goods		61,137			34,441
Less: Inventory reserve		(560,000	)		(550,000	)
	$	3,483,883		$	3,092,679