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Note 2 - Fair Value Measurement (Tables)
6 Months Ended
Jun. 30, 2014
Fair Value Disclosures [Abstract]  
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
           

Fair value measurements at December 31, 2013 using

 

(in thousands)

 

December 31, 2013

   

Quoted prices in active markets for identical assets
(Level
1)

   

Significant
other
observable
inputs
(Level 2)

   

Significant
u
nobservable
inputs
(Level 3)

 

Liabilities:

                               

Ordinary share warrants

  $ 296     $     $     $ 296  

Total

  $ 296     $     $     $ 296  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

(in thousands)

 

Three months ended

June 30, 2014

   

Six months ended

June 30, 2014

 

Balance – beginning

  $ 306     $ 296  

Change in fair value of warrant liability

    12       22  

Reclassification of liability to additional paid-in capital upon exercise of warrants

    (318 )     (318 )

Balance at June 30, 2014

  $     $