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Note 17 - Stockholders' Equity (Tables)
 6 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Stockholders Equity [Table Text Block]
   
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
Accumulated
    
 
 
 
   
 
 
 
  
 
 
 
  
Additional
    
 
 
 
  
Other
    
Total
  
   
Common Stock
    
Paid-in
    
Accumulated
    
Comprehensive
    
Stockholders'
  
   
Shares
    
Amount
    
Capital
    
Deficit
    
Loss
    
Equity
  
Balance at September 30, 2020
    
33,561,544
     $
336
     $
91,248
     $
(41,858
 )   $
(250
 )   $
49,140
  
Share-based compensation expense
    
-
      
-
      
182
      
-
      
-
      
182
  
Issuance of common stock upon exercise of stock options, net
    
25,899
      
-
      
54
      
-
      
-
      
54
  
Obligation to issue common stock
    
-
      
-
      
3,431
      
-
      
-
      
3,431
  
Other comprehensive income
    
-
      
-
      
-
      
-
      
469
      
469
  
Net loss
    
-
      
-
      
-
      
(619
 )    
-
      
(619
 )
Balance at December 31, 2020
    
33,587,443
     $
336
     $
94,915
     $
(42,477
 )   $
219
     $
52,657
  
                                                 
Share-based compensation expense
    
-
     $
-
     $
328
     $
-
     $
-
     $
328
  
Issuance of common stock upon exercise of stock options, net
    
60,563
      
1
      
116
      
-
      
-
      
116
  
Issuance of common stock upon vesting of restricted stock units
    
223,633
      
2
      
-
      
-
      
-
      
-
  
Shares retained for payment of taxes in connection with net share settlement of restricted stock units
    
(22,073
 )    
-
      
(141
 )    
-
      
-
      
(141
 )
Other comprehensive loss
    
-
      
-
      
-
      
-
      
(78
 )    
(78
 )
Net income
    
-
      
-
      
-
      
262
      
-
      
262
  
Balance at March 31, 2021
    
33,849,566
     $
339
     $
95,218
     $
(42,215
 )   $
141
     $
53,144
  
   
 
 
 
  
 
 
 
  
Additional
    
 
 
 
  
Other
    
Total
  
   
Common Stock
    
Paid-in
    
Accumulated
    
Comprehensive
    
Stockholders'
  
   
Shares
    
Amount
    
Capital
    
Deficit
    
Loss
    
Equity
  
Balance at September 30, 2019
    
32,949,987
     $
330
     $
89,572
     $
(53,732
 )   $
(459
 )   $
35,381
  
Share-based compensation expense
    
-
      
-
      
158
      
-
      
-
      
158
  
Issuance of common stock upon exercise of stock options, net
    
83,343
      
1
      
144
      
-
      
-
      
144
  
Other comprehensive loss
    
-
      
-
      
-
      
-
      
85
      
85
  
Net income
    
-
      
-
      
-
      
620
      
-
      
620
  
Balance at December 31, 2019
    
33,033,330
     $
331
     $
89,874
     $
(53,112
 )   $
(374
 )   $
36,388
  
                                                 
Share-based compensation expense
    
-
     $
-
     $
296
     $
-
     $
-
     $
296
  
Issuance of common stock upon exercise of stock options, net
    
56,861
      
-
      
114
      
-
      
-
      
114
  
Issuance of common stock upon vesting of restricted stock units
    
198,106
      
2
      
-
      
-
      
-
      
-
  
Shares retained for payment of taxes in connection with net share settlement of restricted stock units
    
(13,063
 )    
-
      
(41
 )    
-
      
-
      
(41
 )
Stock buyback
    
(156,505
 )    
(2
 )    
(398
 )    
-
      
-
      
(398
 )
Other comprehensive loss
    
-
      
-
      
-
      
-
      
(69
 )    
(69
 )
Net loss
    
-
      
-
      
-
      
302
      
 
      
302
  
Balance at March 31, 2020
    
33,118,729
     $
331
     $
89,845
     $
(52,810
 )   $
(443
 )   $
36,592