CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Net sales	$ 3,975,736	$ 2,625,793	$ 8,012,891	$ 7,955,035
Cost of sales	2,006,132	1,689,113	4,562,761	5,377,195
Gross margin	1,969,604	936,680	3,450,130	2,577,840
Operating expenses:
Selling, general and administrative	530,180	548,391	1,652,116	1,881,072
Litigation expenses	59,680	134,765	134,799	560,610
Legal damages	0	0	0	2,100,000
Engineering, research and development	622,082	546,691	1,642,785	1,691,631
Total operating expenses	1,211,942	1,229,847	3,429,700	6,233,313
Income (loss) from operations	757,662	(293,167)	20,430	(3,655,473)
Other income (expense):
Interest income	1,010	0	3,017	0
Proceeds from life insurance	0	0	0	92,678
Amortization of deferred financing costs	0	(649)	0	(3,363)
Change in fair value of common stock warrants	(23,000)	5,000	(23,000)	95,000
Interest expense - judgment	(72,003)	(30,523)	(215,226)	(30,523)
Interest expense	(24,216)	(14,097)	(83,251)	(38,435)
Total other (expense) income	(118,209)	(40,269)	(318,460)	115,357
Income (loss) before income taxes	639,453	(333,436)	(298,030)	(3,540,116)
Income tax expense	0	0	0	0
Net income (loss)	639,453	(333,436)	(298,030)	(3,540,116)
Deemed dividend related to beneficial conversion feature of Series B Convertible Preferred Stock	(420,000)	0	(420,000)	0
Preferred stock dividends	(112,807)	(30,667)	(232,807)	(30,667)
Net income (loss) attributable to common shareholders	$ 106,646	$ (364,103)	$ (950,837)	$ (3,570,783)
Basic income (loss) per common share (in Dollars per share)	$ 0.03	$ (0.11)	$ (0.29)	$ (1.10)
Diluted income (loss) per common share (in Dollars per share)	$ 0.03	$ (0.11)	$ (0.29)	$ (1.10)
Weighted average shares outstanding:
Basic (in Shares)	3,255,887	3,255,887	3,255,887	3,255,887
Diluted (in Shares)	3,409,657	3,255,887	3,255,887	3,255,887