Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 4,132,393	$ 2,939,437
Cost of sales	2,117,646	1,434,826
Gross margin	2,014,747	1,504,611
Selling, general and administrative	554,031	661,251
Litigation expenses	1,181	2,696
Engineering, research, and development	693,575	631,953
Total operating expenses	1,248,787	1,295,900
Income from operations	765,960	208,711
Interest income	984	2,846
Other income	13,593	13,854
Interest expense - judgment	(51,920)	(75,144)
Interest expense	0	(9,780)
Total other net (expense)	(37,343)	(68,224)
Income before income taxes	728,617	140,487
Income tax expense	153,116	29,507
Net income	575,501	110,980
Preferred stock dividends	(80,000)	(80,000)
Net income attributable to common shareholders	$ 495,501	$ 30,980
Basic income per common share (in Dollars per share)	$ 0.15	$ 0.01
Diluted income per common share (in Dollars per share)	$ 0.11	$ 0.01
Weighted average shares outstanding:
Basic (in Shares)	3,255,887	3,255,887
Diluted (in Shares)	5,095,665	3,255,887