Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net sales	$ 3,912,168	$ 2,222,941	$ 7,218,630	$ 4,037,155
Cost of sales	2,038,535	1,223,728	3,763,393	2,556,629
Gross margin	1,873,633	999,213	3,455,237	1,480,526
Selling, general and administrative	625,163	555,411	1,237,634	1,121,936
Litigation expenses	91,553	35,848	102,060	75,119
Engineering, research and development	525,739	503,380	1,050,842	1,020,703
Total operating expenses	1,242,455	1,094,639	2,390,536	2,217,758
Income (loss) from operations	631,178	(95,426)	1,064,701	(737,232)
Interest income	1,018	1,009	2,018	2,007
Change in fair value of common stock warrants	5,500	0	(73,000)	0
Interest expense – judgement	(90,596)	(72,003)	(171,106)	(143,223)
Interest expense	(10,866)	(24,990)	(28,603)	(59,035)
Total other expense, net	(94,944)	(95,984)	(270,691)	(200,251)
Income (loss) before income taxes	536,234	(191,410)	794,010	(937,483)
Income tax expense	0	0	0	0
Net income (loss)	536,234	(191,410)	794,010	(937,483)
Preferred dividends	80,000	60,000	160,000	120,000
Net income (loss) attributable to common shareholders	$ 456,234	$ (251,410)	$ 634,010	$ (1,057,483)
Basic income (loss) per common share (in Dollars per share)	$ 0.14	$ (0.08)	$ 0.19	$ (0.32)
Diluted income (loss) per common share (in Dollars per share)	$ 0.11	$ (0.08)	$ 0.16	$ (0.32)
Weighted average shares outstanding:
Basic (in Shares)	3,255,887	3,255,887	3,255,887	3,255,887
Diluted (in Shares)	4,945,665	3,255,887	4,945,665	3,255,887