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Note 12 - Stockholders' Equity - Common Stock Dividend Policy (Details) | 12 Months Ended
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Dec. 31, 2021 $ / shares
Quarterly Average Realized Price, Level 1 [Member] |
Quarterly dividend per share (in dollars per share) | $ 0.0025
Annual dividend per share (in dollars per share) | 0.01
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.025
Quarterly Average Realized Price, Level 2 [Member] |
Quarterly dividend per share (in dollars per share) | 0.0100
Annual dividend per share (in dollars per share) | 0.04
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.055
Quarterly Average Realized Price, Level 3 [Member] |
Quarterly dividend per share (in dollars per share) | 0.0150
Annual dividend per share (in dollars per share) | 0.06
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.075
Quarterly Average Realized Price, Level 4 [Member] |
Quarterly dividend per share (in dollars per share) | 0.0250
Annual dividend per share (in dollars per share) | 0.10
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.115
Quarterly Average Realized Price, Level 5 [Member] |
Quarterly dividend per share (in dollars per share) | 0.0350
Annual dividend per share (in dollars per share) | 0.14
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.155
Quarterly Average Realized Price, Level 6 [Member] |
Quarterly dividend per share (in dollars per share) | 0.0450
Annual dividend per share (in dollars per share) | 0.18
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | 0.195
Quarterly Average Realized Price, Level 7 [Member] |
Quarterly dividend per share (in dollars per share) | 0.0550
Annual dividend per share (in dollars per share) | 0.22
Minimum annual component per share (in dollars per share) | 0.015
Annualized dividends (in dollars per share) | $ 0.235

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- Definition The amount of annualized dividends per share. + References No definition available. + Details
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