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Note 11 - Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2014
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]

Assets

 

Total

   

Quoted Prices in

Active Markets for

Identical Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

   

Significant

Unobservable Inputs

(Level 3)

 

Money market mutual funds

  $ 26,356     $ 26,356     $     $  

Assets

 

Total

   

Quoted Prices in

Active Markets for

Identical Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

   

Significant

Unobservable Inputs

(Level 3)

 

Money market mutual funds

  $ 26,353     $ 26,353     $     $