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Note 17 - Stock Incentive Plans (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
   
 
 
 
 
Weighted
 
   
 
 
 
 
Average
 
   
 
 
 
 
Grant-Date
 
   
Number of
   
Fair
 
   
Shares
   
Value
 
Nonvested at December 31, 2018
   
1,185
    $
1.88
 
Granted
   
610
    $
1.68
 
Vested
   
(770
)   $
1.86
 
Canceled or expired
   
(233
)   $
1.93
 
Nonvested at December 31, 2019
   
792
    $
1.74
 
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
   
 
 
 
 
Weighted
 
   
 
 
 
 
Average
 
   
 
 
 
 
Grant-Date
 
   
Number of
   
Fair
 
   
Shares
   
Value
 
Nonvested at December 31, 2018
   
1,938
    $
1.10
 
Granted
   
1,437
    $
0.94
 
Vested
   
-
    $
-
 
Canceled or expired
   
(1,746
)   $
1.00
 
Nonvested at December 31, 2019
   
1,629
    $
1.07
 
Share-based Payment Arrangement, Activity [Table Text Block]
   
Years Ended
 
   
December 31,
 
   
2019
   
2018
 
Total compensation cost for share-based payments
  $
1,580
    $
1,757
 
Weighted average grant-date fair value of equity instruments granted
  $
1.16
    $
0.97
 
Total fair value of shares vested during the period
  $
1,432
    $
1,534
 
Unamortized share-based payments
  $
1,124
    $
1,438
 
Weighted average period in years to be recognized as expense
   
1.69
     
1.06