Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares |
3 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2020 |
Jun. 30, 2020 |
Sep. 30, 2019 |
Jun. 30, 2019 |
|
| Additional Paid-in Capital [Member] | ||||
| Common Stock per share (in dollars per share) | $ 1 | $ 1 | ||
| Common Stock per share (in dollars per share) | $ 1 | $ 1 | ||