Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net sales	$ 3,306,462	$ 1,814,214
Cost of sales	1,724,858	1,332,901
Gross margin	1,581,604	481,313
Operating expenses:
Selling, general and administrative	612,471	566,525
Litigation costs	10,507	39,271
Engineering, research and development	525,103	517,323
Total operating expenses	1,148,081	1,123,119
Income (loss) from operations	433,523	(641,806)
Other income (expense):
Change in fair value of common stock warrants	(78,500)	0
Interest income	1,000	998
Interest expense – judgment	(80,510)	(71,220)
Interest expense	(17,737)	(34,045)
Total other expense	(175,747)	(104,267)
Income (loss) before income taxes	257,776	(746,073)
Income tax expense	0	0
Net income (loss)	257,776	(746,073)
Preferred stock dividends	(80,000)	(60,000)
Net income (loss) attributable to common shareholders	$ 177,776	$ (806,073)
Net income (loss) per share:
Basic income (loss) per common share (in Dollars per share)	$ 0.05	$ (0.25)
Diluted income (loss) per common share (in Dollars per share)	$ 0.05	$ (0.25)
Weighted average shares outstanding:
Basic (in Shares)	3,255,887	3,255,887
Diluted (in Shares)	3,411,418	3,255,887