Consolidated Statements of Operations - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 11,582,520	$ 15,774,943
Cost of sales	6,800,021	8,365,042
Gross margin	4,782,499	7,409,901
Selling, general and administrative	2,165,190	2,477,548
Litigation expenses	248,004	140,050
Engineering, research and development	2,295,901	2,239,811
Total operating expenses	4,709,095	4,857,409
Income from operations	73,404	2,552,492
Interest income	7,483	5,819
Change in fair value of common stock warrants	0	(73,000)
Forgiveness of PPP Loan	722,577	0
Interest expense	(29,779)	(55,557)
Interest expense – judgment	(231,474)	(342,544)
Other Income	30,819	0
Total other (expense) income	499,626	(465,282)
Income before income taxes	573,030	2,087,210
Benefit for income taxes	(27,027)	(2,649,280)
Net income	600,057	4,736,490
Preferred dividends	(320,000)	(320,000)
Net income attributable to common shareholders	$ 280,057	$ 4,416,490
Basic income per common share (in Dollars per share)	$ 0.09	$ 1.36
Diluted income per common share (in Dollars per share)	$ 0.12	$ 0.95
Weighted average number of shares outstanding
Basic (in Shares)	3,255,887	3,255,887
Diluted (in Shares)	5,073,165	4,960,665