Note 10 - Stockholders' Equity - Warrant Activity (Details) - $ / shares |
12 Months Ended | |||
---|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2019 |
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Balance (in shares) | 6,080,000 | 250,000 | ||
Balance (in dollars per share) | [1] | $ 0.75 | $ 0.54 | |
Warrants issued (in shares) | 9,134,615 | 5,830,000 | ||
Warrants issued (in dollars per share) | [1] | $ 0.57 | $ 0.76 | |
Warrants exercised (in shares) | (12,318,877) | |||
Warrants exercised (in dollars per share) | [1] | $ 0.63 | ||
Warrants expired (in shares) | (250,000) | |||
Warrants expired (in dollars per share) | [1] | $ 0.54 | ||
Balance (in shares) | 2,645,738 | 6,080,000 | ||
Balance (in dollars per share) | [1] | $ 0.70 | $ 0.75 | |
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