Note 10 - Employee Benefit Plan (Tables)

12 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended
	March 31, 2022			March 31, 2021
Weighted-average volatility		131	%		127	%
Expected term (in years)		10	%		10
Risk-free interest rate		1.42	%		0.93	%

Schedule of Stock Options Roll Forward [Table Text Block]

					Weighted
			Weighted		Average
			Average		Remaining		Aggregate
			Exercise		Contractual		Intrinsic
Employee options and warrants	Options		Price $		Life (years)		Value ($)
Outstanding at March 31, 2020		10,983,334	$	0.28		6.02	$	-
Granted		6,750,000	$	0.05
Exercised		-
Forfeited		-
Outstanding at March 31, 2021		17,733,334	$	0.11		6.80	$	172,000
Granted		-
Exercised		-
Forfeited		-
Outstanding at March 31, 2022		17,733,334	$	0.11		5.80	$	-
Fully vested and expected to vest at March 31, 2022		17,733,334	$	0.11
Exercisable at March 31, 2022		15,566,668	$	0.12

					Weighted
			Weighted		Average
			Average		Remaining		Aggregate
			Exercise		Contractual		Intrinsic
Nonemployee options	Options		Price $		Life (years)		Value ($)
Outstanding at March 31, 2020		2,383,000	$	0.27		6.75	$	-
Granted		3,500,000	$	0.05
Exercised		-
Forfeited		-
Outstanding at March 31, 2021		5,883,000	$	0.14		8.11	$	-
Granted		600,000	$	0.05
Exercised		-
Forfeited		-
Outstanding at March 31, 2022		6,483,000	$	0.13		7.31	$	-
Fully vested and expected to vest at March 31, 2022		6,483,000	$	0.13
Exercisable at March 31, 2022		6,483,000	$	0.13