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Note 9 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2013
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

  $ 26,350     $ 26,350     $     $  

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

  $ 26,341     $ 26,341     $     $