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Note 16 - Stockholders' Equity - Summary of Changes in Stockholders' Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2023
Jun. 30, 2022
Balance $ 44,802 $ 47,604 $ 50,393 $ 64,472 $ 64,731 $ 65,958 $ 50,393 $ 65,958
Share-based compensation expense 396 513 420 355 737 558    
Issuance of common stock upon exercise of stock options, net (in shares)             258,871 130,000
Issuance of common stock upon exercise of stock options, net 1 54 32 83 124 46    
Issuance of common stock upon vesting of restricted stock units (in shares)             253,012 251,918
Stock buyback         (557) (441)    
Issuance of common stock upon vesting of restricted stock units 0 (2)   0 0      
Release of obligation to issue commons stock     0     0    
Accumulated other comprehensive loss (21)   (266) 452 1 85    
Accumulated other comprehensive income 21   266 (452) (1) (85)    
Net loss (1,423) (3,403) (3,507) (589) (492) (1,305) $ (8,334) $ (2,386)
Shares retained for payment of taxes in connection with net share settlement of restricted stock units (207) (45)     (70)      
Accumulated other comprehensive loss   81            
Retirement of common stock 0              
Retirement of common stock (0)              
Balance $ 43,590 $ 44,802 $ 47,604 $ 63,869 $ 64,472 $ 64,731 $ 43,590 $ 63,869
Common Stock [Member]                
Balance (in shares) 36,984,295 36,713,471 36,611,240 36,528,085 36,371,529 36,403,833 36,611,240 36,403,833
Balance $ 370 $ 367 $ 366 $ 365 $ 363 $ 364 $ 366 $ 364
Share-based compensation expense $ 0 $ 0 $ 0 $ 0 $ 0      
Issuance of common stock upon exercise of stock options, net (in shares) 1,000 33,765 20,000 60,000 55,000 15,000    
Issuance of common stock upon exercise of stock options, net $ 0 $ 1 $ 0 $ 1 $ 1 $ 0    
Issuance of common stock upon vesting of restricted stock units (in shares) 7,584 232,761 12,667 7,920 262,342      
Stock buyback (in shares)         (142,442) (116,868)    
Stock buyback         $ (1) $ (1)    
Issuance of common stock upon vesting of restricted stock units $ 0 $ 2   $ 0 2      
Release of obligation to issue commons stock (in shares)     69,564     69,564    
Release of obligation to issue commons stock     $ 1     $ 0    
Accumulated other comprehensive loss 0   0 0 0 0    
Accumulated other comprehensive income 0   0 0 0 0    
Net loss $ 0 $ 0 $ 0 $ 0 $ 0 $ 0    
Issuance of common stock upon cashless exercise of stock options, net (in shares) 372,286 15,914            
Shares retained for payment of taxes in connection with net share settlement of restricted stock units (in shares) (74,606) (11,616)     (18,344)      
Shares retained for payment of taxes in connection with net share settlement of restricted stock units $ (1) $ 0     $ 0      
Accumulated other comprehensive loss   $ 0            
Issuance of common stock upon cashless exercise of stock options, net $ 4              
Retirement of common stock (in shares) (109,488)              
Retirement of common stock $ (1)              
Retirement of common stock $ 1              
Balance (in shares) 37,181,071 36,984,295 36,713,471 36,596,005 36,528,085 36,371,529 37,181,071 36,596,005
Balance $ 372 $ 370 $ 367 $ 366 $ 365 $ 363 $ 372 $ 366
Additional Paid-in Capital [Member]                
Balance 109,523 109,003 108,551 107,507 107,273 107,110 108,551 107,110
Share-based compensation expense 396 513 420 355 737 558    
Issuance of common stock upon exercise of stock options, net 1 54 32 83 124 46    
Stock buyback         (557) (441)    
Issuance of common stock upon vesting of restricted stock units 0 (2) 0 0 0      
Release of obligation to issue commons stock     0     0    
Accumulated other comprehensive loss 0   0 0 0 0    
Accumulated other comprehensive income 0   0 0 0 0    
Net loss 0 0 0 0 0 0    
Shares retained for payment of taxes in connection with net share settlement of restricted stock units (207) (45)     (70)      
Accumulated other comprehensive loss   0            
Retirement of common stock (300)              
Retirement of common stock 300              
Balance 110,013 109,523 109,003 107,945 107,507 107,273 110,013 107,945
Retained Earnings [Member]                
Balance (64,276) (60,873) (57,366) (42,951) (42,459) (41,154) (57,366) (41,154)
Share-based compensation expense 0 0 0 0 0 0    
Issuance of common stock upon exercise of stock options, net 0 0 0 0 0 0    
Stock buyback         0 0    
Issuance of common stock upon vesting of restricted stock units 0 0   0 0      
Release of obligation to issue commons stock     0     0    
Accumulated other comprehensive loss 0   0 0 0 0    
Accumulated other comprehensive income 0   0 0 0 0    
Net loss (1,423) (3,403) (3,507) (589) (492) (1,305)    
Shares retained for payment of taxes in connection with net share settlement of restricted stock units 0 0     0      
Accumulated other comprehensive loss   0            
Retirement of common stock (300)              
Retirement of common stock 300              
Balance (65,999) (64,276) (60,873) (43,540) (42,951) (42,459) (65,999) (43,540)
AOCI Attributable to Parent [Member]                
Balance (445) (526) (792) (84) (83) 2 (792) 2
Share-based compensation expense 0 0 0 0 0 0    
Issuance of common stock upon exercise of stock options, net 0 0 0 0 0 0    
Stock buyback         0 0    
Issuance of common stock upon vesting of restricted stock units 0 0 0 0 0      
Release of obligation to issue commons stock           0    
Accumulated other comprehensive loss (21)   (266) 452 1 85    
Accumulated other comprehensive income 21   266 (452) (1) (85)    
Net loss 0 0   0 0 0    
Shares retained for payment of taxes in connection with net share settlement of restricted stock units 0 0     0      
Accumulated other comprehensive loss   81            
Balance $ (424) $ (445) $ (526) $ (536) $ (84) $ (83) $ (424) $ (536)