Note 7 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

As of December  31, 2017

As of December 31, 2016

Level I

Level II

Level III

Fair Value

Level I

Level II

Level III

Fair Value

Financial assets:

Cash equivalents:

Money market funds

6,870

–

–

6,870

6,140

–

–

6,140

Short-term investments:

US Treasury securities

39,731

–

–

39,731

–

–

–

–

Term bank deposits

40,137

–

–

40,137

65,493

–

–

65,493

Other current assets:

Forward foreign exchange contracts

–

163

–

163

–

–

–

–

Financial liabilities:

Forward foreign exchange contracts

–

–

–

–

–

(479

)

–

(479

)

Total financial assets (liabilities)

$

86,738

$

163

$

–

$

86,901

$

71,633

$

(479

)

$

–

$

71,154