Note 1 - General Information (Details Textual) |
Mar. 31, 2023
$ / shares
|
Jun. 30, 2022
$ / shares
|
---|---|---|
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.001 | $ 0.001 |
Number of Patents Granted | 21 | |
Number of Wholly Owned Subsidiaries | 3 |