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Note 14 - Stockholders' Equity - Outstanding Warrants (Details)
shares in Thousands
 6 Months Ended
Jun. 30, 2022
$ / shares
shares
Outstanding warrants (in shares) | shares 7,082
Outstanding warrants, weighted-average exercise price (in dollars per share) | $ / shares $ 1.63
Warrants granted (in shares) | shares 37,500
Warrants granted, weighted average exercise price (in dollars per share) | $ / shares $ 0.53
Outstanding warrants (in shares) | shares 44,582
Outstanding warrants, weighted-average exercise price (in dollars per share) | $ / shares $ 0.71