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Note 6 - Fair Value Measurement (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Description

 

September 30, 2020 (unaudited)

  

Level I (unaudited)

  

Level II (unaudited)

  

Level III (unaudited)

 

Assets:

                

Marketable securities:

                

Corporate bonds

 $78,506  $  $78,506  $ 

Foreign exchange contracts

  26      26    

Description

 

December 31, 2019

  

Level I

  

Level II

  

Level III

 

Assets:

                

Marketable securities:

                

Corporate bonds

  64,867      64,867    

Foreign exchange contracts

  56      56