Net Income per Share (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Basic net income per share computation:
Net income	$ 499,633	$ 907,577	$ 833,361	$ 1,701,587
Preferred dividends	(80,000)	(80,000)	(240,000)	(240,000)
Net income attributable to common shareholders	419,633	827,577	593,361	1,461,587
Add: Preferred dividends	80,000	80,000	240,000	240,000
Diluted income attributable to common shareholders	$ 499,633	$ 907,577	$ 833,361	$ 1,701,587
Weighted-average common shares outstanding (in Shares)	3,255,887	3,255,887	3,255,887	3,255,887
Incremental shares attributable to the assumed conversion of preferred stock, and exercise of outstanding stock options and warrants (in Shares)	1,839,778	1,719,778	1,809,778	1,568,765
Total adjusted weighted-average shares (in Shares)	5,095,665	4,975,665	5,065,665	4,824,652
Diluted net income (loss) per share (in Dollars per share)	$ 0.10	$ 0.18	$ 0.16	$ 0.35
Basic net income per share (in Dollars per share)	$ 0.13	$ 0.25	$ 0.18	$ 0.45