Consolidated Statements of Operations - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 12,116,050	$ 10,024,588
Cost of sales	6,698,830	6,894,779
Gross margin	5,417,220	3,129,809
Operating expenses:
Selling, general and administrative	2,215,521	2,491,816
Litigation expenses	234,720	610,125
Legal damages	0	2,159,000
Engineering, research and development	2,312,043	2,275,508
Total operating expenses	4,762,284	7,536,449
Income (loss) from operations	654,936	(4,406,640)
Other income (expense):
Proceeds from life insurance	0	92,678
Interest income	4,005	866
Amortization of deferred financing costs	0	(3,363)
Change in fair value of common stock warrants	(43,500)	95,000
Interest expense	(100,750)	(59,787)
Interest expense – judgment	(310,663)	(100,960)
Interest expense - related parties	(990)	(3,605)
Total other (expense) income	(451,898)	20,829
Income (loss) before income taxes	203,038	(4,385,811)
Benefit for income taxes	0	(63,500)
Net income (loss)	203,038	(4,322,311)
Deemed dividend related to beneficial conversion feature of Series B Convertible Preferred Stock	(420,000)	0
Preferred dividends	(312,807)	(90,667)
Net loss attributable to common shareholders	$ (529,769)	$ (4,412,978)
Basic loss per common share (in Dollars per share)	$ (0.16)	$ (1.36)
Diluted loss per common share (in Dollars per share)	$ (0.16)	$ (1.36)
Weighted average number of shares outstanding
Basic (in Shares)	3,255,887	3,255,887
Diluted (in Shares)	3,255,887	3,255,887