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Note 11 - Stockholders' Equity and Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three months ended June 30,
    
Six months ended June 30,
  
   
2018
    
2017
    
2018
    
2017
  
Earnings allocable to common shares:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Numerator - Loss Attributable to Common Shareholders:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Net Loss from continuing operations
   $
(2,497
 )   $
(2,125
 )   $
(6,291
 )   $
(5,098
 )
Loss attributable to noncontrolling interest loss allocation
    
25
      
(755
 )    
115
      
(734
 )
Preferred dividends - cash and deemed    
(1,704
 )    
(1,205
 )    
(3,112
 )    
(2,392
 )
Net Loss from continuing operations attributable to common shareholders    
(4,176
 )    
(4,085
 )    
(9,288
 )    
(8,224
 )
Net Income from discontinued operations attributable to common shareholders
    
-
      
(240
 )    
-
      
4,736
  
Net (Income) Loss attributable to common shareholders   $
(4,176
 )   $
(4,325
 )   $
(9,288
 )   $
(3,488
 )
                                 
Denominator - Weighted average shares:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Weighted average number of common shares - basic & diluted
    
16,696,684
      
16,154,341
      
16,680,988
      
16,121,992
  
Basic and diluted earnings per common share:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Net loss per share, continuing operations
   $
(0.15
 )   $
(0.18
 )   $
(0.37
 )   $
(0.36
 )
Preferred dividends per share
    
(0.10
 )    
(0.07
 )    
(0.19
 )    
(0.15
 )
Net loss per share, continuing operations, net
    
(0.25
 )    
(0.25
 )    
(0.56
 )    
(0.51
 )
Net income per share, discontinued operations
    
-
      
(0.01
 )    
-
      
0.29
  
Net income (loss) attributable to common shareholders per share
   $
(0.25
 )   $
(0.26
 )   $
(0.56
 )   $
(0.22
 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Three months ended June 30,
    
Six months ended June 30,
  
   
2018
    
2017
    
2018
    
2017
  
Options to purchase common stock
    
1,062,807
      
939,951
      
1,066,465
      
939,312
  
Restricted stock
    
372,815
      
916,492
      
382,638
      
789,197
  
Warrants to purchase common stock
    
2,600,000
      
2,000,000
      
2,470,718
      
2,000,000
  
Convertible preferred stock
    
10,552,941
      
8,200,000
      
10,045,954
      
8,200,000
  
Total
    
14,588,563
      
12,056,443
      
13,965,775
      
11,928,509