Note 11 - Convertible Preferred Stock, Net (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Temporary Equity [Table Text Block]
 
 
Dollar Value
 
 
Share Count
 
Balance at December 31, 2014
   $
-
     
-
 
Shares issued
    
81,250
     
805,000
 
Issuance costs
    
(3,531
 )    
-
 
Beneficial conversion feature
    
(1,071
 )    
-
 
Amortization of beneficial conversion feature
    
1,071
     
-
 
Conversion to common stock
    
(149
 )    
(1,482
 )
Allocation of issuance costs
    
6
     
-
 
Balance at December 31, 2015
   $
77,576
     
803,518
 
Conversion to common stock
    
(12
 )    
(120
 )
Allocation of issuance costs
    
1
     
-
 
Balance at December 31, 2016
   $
77,565
     
803,398