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Note 17 - Stockholders' Equity - Summary of Changes in Stockholders' Equity (Details) - USD ($)
$ 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
Balance $ 53,144 $ 52,657 $ 49,140 $ 36,592 $ 36,388 $ 35,381 $ 49,140 $ 35,381
Share-based compensation expense 446 328 182 322 296 158    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)             86,462 512,019
Issuance of common stock upon exercise of stock options, net   116 54 738 114 144    
Obligation to issue common stock     3,431          
Other comprehensive income (loss) 183 (78) 469 51 (69) 85    
Net income (loss) 290 262 (619) 1,504 302 620 $ (67) $ 2,426
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares)             206,560 185,043
Issuance of common stock upon vesting of restricted stock units 0 0     0      
Shares retained for payment of taxes in connection with net share settlement of restricted stock units   (141)     (41)      
Issuance of common stock in business combination 10,938              
Release of obligation to issue commons stock 0              
Stock buyback         (398)      
Balance $ 65,001 $ 53,144 $ 52,657 $ 39,207 $ 36,592 $ 36,388 $ 65,001 $ 39,207
Common Stock [Member]                
Balance (in shares) 33,849,566 33,587,443 33,561,544 33,118,729 33,033,330 32,949,987 33,561,544 32,949,987
Balance $ 339 $ 336 $ 336 $ 331 $ 331 $ 330 $ 336 $ 330
Share-based compensation expense 0 $ 0 $ 0 $ 0 $ 0 $ 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)   60,563 25,899 371,815 56,861 83,343    
Issuance of common stock upon exercise of stock options, net   $ 1 $ 0 $ 4 $ 0 $ 1    
Obligation to issue common stock     0          
Other comprehensive income (loss) 0 0 0 0 0 0    
Net income (loss) $ 0 $ 0 $ 0 $ 0 $ 0 $ 0    
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares) 5,000 223,633     198,106      
Issuance of common stock upon vesting of restricted stock units $ 0 $ 2     $ 0      
Shares retained for payment of taxes in connection with net share settlement of restricted stock units (in shares)   (22,073)     (13,063)      
Shares retained for payment of taxes in connection with net share settlement of restricted stock units   $ 0     $ 0      
Stock Issued During Period, Shares, Acquisitions (in shares) 2,165,824              
Issuance of common stock in business combination $ 22              
Release of obligation to issue commons stock (in shares) 121,703              
Release of obligation to issue commons stock $ 1              
Stock buyback (in shares)         (156,505)      
Stock buyback         $ 0      
Balance (in shares) 36,142,093 33,849,566 33,587,443 33,490,544 33,118,729 33,033,330 36,142,093 33,490,544
Balance $ 362 $ 339 $ 336 $ 335 $ 331 $ 331 $ 362 $ 335
Additional Paid-in Capital [Member]                
Balance 95,218 94,915 91,248 89,845 89,874 89,572 91,248 89,572
Share-based compensation expense 446 328 182 322 296 158    
Issuance of common stock upon exercise of stock options, net   116 54 738 114 144    
Obligation to issue common stock     3,431          
Other comprehensive income (loss) 0 0 0 0 0 0    
Net income (loss) 0 0 0 0 0 0    
Issuance of common stock upon vesting of restricted stock units 0 0     0      
Shares retained for payment of taxes in connection with net share settlement of restricted stock units   (141)     (41)      
Issuance of common stock in business combination 10,938              
Release of obligation to issue commons stock 0              
Stock buyback         (398)      
Balance 106,602 95,218 94,915 90,905 89,845 89,874 106,602 90,905
Retained Earnings [Member]                
Balance (42,215) (42,477) (41,858) (52,810) (53,112) (53,732) (41,858) (53,732)
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    
Obligation to issue common stock     0          
Other comprehensive income (loss) 0 0 0   0 0    
Net income (loss) 290 262 (619) 1,504 302 620    
Issuance of common stock upon vesting of restricted stock units 0 0     0      
Shares retained for payment of taxes in connection with net share settlement of restricted stock units   0     0      
Issuance of common stock in business combination 0              
Release of obligation to issue commons stock 0              
Stock buyback         0      
Balance (41,925) (42,215) (42,477) (51,306) (52,810) (53,112) (41,925) (51,306)
AOCI Attributable to Parent [Member]                
Balance 141 219 (250) (443) (374) (459) (250) (459)
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    
Obligation to issue common stock     0          
Other comprehensive income (loss) 183 (78) 469 51 (69) 85    
Net income (loss) 0 0 0 0 0    
Issuance of common stock upon vesting of restricted stock units 0 0     0      
Shares retained for payment of taxes in connection with net share settlement of restricted stock units   0     0      
Issuance of common stock in business combination 0              
Release of obligation to issue commons stock 0              
Stock buyback         0      
Balance $ 324 $ 141 $ 219 $ (392) $ (443) $ (374) $ 324 $ (392)