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Note 17 - Net (Loss) Income Per Share - Basic and Diluted Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2022
Mar. 31, 2021
Net (loss) income $ (492) $ (1,305) $ 262 $ (619) $ (1,797) $ (357)
Basic (loss) income per share (in dollars per share) $ (0.01)   $ 0.01   $ (0.05) $ (0.01)
Diluted (loss) income per share (in dollars per share) $ (0.01)   $ 0.01   $ (0.05) $ (0.01)
Weighted average shares outstanding - basic (in shares) 36,353,321   33,683,240   36,405,321 33,629,479
Assumed exercise of dilutive options (in shares) 0   1,096,026   0 0
Weighted average shares outstanding - diluted (in shares) 36,353,321   34,779,266   36,405,321 33,629,479
Antidilutive securities (in shares) 3,499,439   830,000   3,499,439 3,049,387
Share-Based Payment Arrangement, Option [Member]            
Antidilutive securities (in shares) 2,977,384   830,000   2,977,384 2,723,718
Restricted Stock Units (RSUs) [Member]            
Antidilutive securities (in shares) 382,927   0   382,927 325,669
Obligation to Issue Common Stock [Member]            
Antidilutive securities (in shares) 139,128   0   139,128 0