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Note 5 - Prepaid Expenses, Deposits and Other (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   
June 30,
   
December 31,
 
(in thousands)
 
2018
   
2017
 
Prepaid expenses and other
  $
1,113
    $
1,593
 
Deposits and other assets
  $
1,820
    $
1,865