Note 10 - Accrued Expenses and Other Current Liabilities (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure Text Block Supplement [Abstract]  
Schedule of Accrued Liabilities [Table Text Block]
   

2015

    

2014

  

Accrued employee liabilities

   $ 1,474     $ 3,227  

Accrued property, use, and franchise taxes

     1,248       1,340  

Other

     254       128  

Total

   $ 2,976     $ 4,695