XML 33 R21.htm IDEA: XBRL DOCUMENT v3.19.1
Note 2 - Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
As of December 31, 201
8
 
Level 1
   
Level 2
   
Total
 
Total Cash and cash equivalents
  $
30,657
    $
    $
30,657
 
As of December 31, 201
7
 
Level 1
   
Level 2
   
Total
 
Total Cash and cash equivalents
  $
6,663
    $
    $
6,663