Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 3,610,863	$ 3,336,396	$ 7,743,256	$ 6,275,833
Cost of sales	1,942,956	1,969,573	4,060,602	3,404,399
Gross margin	1,667,907	1,366,823	3,682,654	2,871,434
Selling, general and administrative	596,618	464,809	1,150,651	1,126,060
Litigation expenses	3,220	5,514	4,400	8,210
Engineering, research, and development	682,852	554,555	1,376,427	1,186,508
Total operating expenses	1,282,690	1,024,878	2,531,478	2,320,778
Income from operations	385,217	341,945	1,151,176	550,656
Interest income	995	1,879	1,980	4,725
Other income	22,260	0	35,853	13,854
Gain on forgiveness of PPP loan	722,577	0	722,577	0
Interest expense – judgement	(52,490)	(52,490)	(104,410)	(127,634)
Interest expense	0	(9,380)	0	(19,160)
Total other net income, (expense)	693,342	(59,991)	656,000	(128,215)
Income before income taxes	1,078,559	281,954	1,807,176	422,441
Income tax expense	78,883	59,206	231,999	88,713
Net income	999,676	222,748	1,575,177	333,728
Preferred dividends	80,000	80,000	160,000	160,000
Net income attributable to common shareholders	$ 919,676	$ 142,748	$ 1,415,177	$ 173,728
Basic income per common share (in Dollars per share)	$ 0.28	$ 0.04	$ 0.43	$ 0.05
Diluted income per common share (in Dollars per share)	$ 0.2	$ 0.04	$ 0.31	$ 0.05
Weighted average shares outstanding:
Basic (in Shares)	3,255,887	3,255,887	3,255,887	3,255,887
Diluted (in Shares)	5,095,665	5,068,949	5,095,665	3,255,887