Shareholders' Equity (Details 1) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Equity Compensation Plans Approved [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at the beginning of the period	754,000	672,000
Granted	110,000	185,000
Forfeited/expired	(72,000)	(103,000)
Balance at the end of the period	792,000	754,000
Balance at the beginning of the period	$ 0.39	$ 0.43
Granted	0.54	0.42
Forfeited/expired	0.51	0.71
Balance at the end of the period	$ 0.40	$ 0.39
Equity Compensation Plans Not Approved [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at the beginning of the period	244,000	294,000
Forfeited/expired	0	(50,000)
Balance at the end of the period	244,000	244,000
Balance at the beginning of the period	$ 0.52	$ 0.49
Forfeited/expired	0.00	0.36
Balance at the end of the period	$ 0.52	$ 0.52