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Note 9 - Fair Value (Tables)
3 Months Ended
Mar. 31, 2013
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
 
$
26,346
   
$
26,346
   
$
   
$
 
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
   
$
   
$