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Note 10 - Stock-based Compensation - Stock Option Activity (Details)
 3 Months Ended
Nov. 30, 2023
$ / shares
shares
Outstanding, shares (in shares) | shares 1,557,131
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 11.08
Options granted, shares (in shares) | shares 269,845
Options granted, weighted average exercise price (in dollars per share) | $ / shares $ 13.25
Options exercised, shares (in shares) | shares 0
Options exercised, weighted average exercise price (in dollars per share) | $ / shares $ 0
Cancelled/Forfeited, shares (in shares) | shares 0
Cancelled/Forfeited, weighted average exercise price (in dollars per share) | $ / shares $ 0
Outstanding, shares (in shares) | shares 1,826,976
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 11.4