Note 14 - Stock Based Compensation - Summary of Stock Option Activity (Details) - $ / shares
|
|
12 Months Ended |
Jan. 13, 2020 |
Mar. 31, 2022 |
Mar. 31, 2021 |
| Outstanding, beginning of year (in shares) (in shares) |
|
300,000
|
300,000
|
| Outstanding, beginning of year, weighted average exercise price (in dollars per share) (in dollars per share) |
|
$ 0.20
|
$ 0.20
|
| Issued (in shares) (in shares) |
300,000
|
0
|
0
|
| Issued, weighted average exercise price (in dollars per share) (in dollars per share) |
$ 0.20
|
$ 0
|
$ 0
|
| Exercised (in shares) (in shares) |
|
0
|
0
|
| Exercised, weighted average exercise price (in dollars per share) (in dollars per share) |
|
$ 0
|
$ 0
|
| Expired (in shares) (in shares) |
|
0
|
0
|
| Expired, weighted average exercise price (in dollars per share) (in dollars per share) |
|
$ 0
|
$ 0
|
| Cancelled (in shares) (in shares) |
|
(300,000)
|
|
| Cancelled, weighted average exercise price (in dollars per share) (in dollars per share) |
|
$ 0.20
|
|
| Outstanding, end of period (in shares) (in shares) |
|
0
|
300,000
|
| Outstanding, beginning of year, weighted average exercise price (in dollars per share) (in dollars per share) |
|
$ 0
|
$ 0.20
|
| Exercisable, end of period (in shares) (in shares) |
|
0
|
150,000
|
| Exercisable, end of period (in dollars per share) (in dollars per share) |
|
$ 0
|
$ 0.20
|