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Note 18 - Net Income (Loss) Per Share - Basic and Diluted Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Jun. 30, 2021
Jun. 30, 2020
Net income (loss) $ 290 $ 262 $ (619) $ 1,504 $ 302 $ 620 $ (67) $ 2,426
Basic income (loss) per share (in dollars per share) $ 0.01     $ 0.05     $ (0.00) $ 0.07
Diluted income (loss) per share (in dollars per share) $ 0.01     $ 0.04     $ (0.00) $ 0.07
Weighted average shares outstanding - basic (in shares) 34,109,167     33,289,426     33,797,774 33,122,042
Assumed exercise of dilutive options (in shares) 1,161,778     991,489     0 756,201
Weighted average shares outstanding - diluted (in shares) 35,270,945     34,280,915     33,797,774 33,878,243
Antidilutive securities (in shares) 1,487,098     893,750     3,560,285 893,750
Share-based Payment Arrangement, Option [Member]                
Antidilutive securities (in shares) 1,035,000     893,750     2,743,718 893,750
Restricted Stock Units (RSUs) [Member]                
Antidilutive securities (in shares) 0     0     364,469 0
Obligation to Issue Common Stock [Member]                
Antidilutive securities (in shares) 452,098     0     452,098 0