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Note 6 - Fair Value Measurement (Tables)
 3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  March 31, 2022   Level I   Level II   Level III  

Description

 

(unaudited)

  

(unaudited)

  

(unaudited)

  

(unaudited)

 

Assets:

                

Marketable securities:

                

Corporate bonds

 $92,625  $—  $92,625  $— 

Foreign exchange contract

  186   —   186   — 

Investments in marketable equity securities

  1,788   1,788   —   — 
                 

Liabilities:

                

Foreign exchange contract

  11   —   11   — 

Description

 

December 31, 2021

  

Level I

  

Level II

  

Level III

 

Assets:

                

Marketable securities:

                

Corporate bonds

 $90,298   —  $90,298   — 

Foreign exchange contract

  63   —   63   — 

Investments in marketable equity securities

  2,919   2,919   —   —