Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Tables)

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Note 2 - Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2015
Notes Tables  
Schedule of Cash and Cash Equivalents [Table Text Block]
   
December 31, 2014
   
June 30, 2015
 
                 
Cash
  $ 37,314     $ 51,852  
Available-for-sale investments
    7,502       22,570  
Total cash and cash equivalents
  $ 44,816     $ 74,422  
Available-for-sale Securities [Table Text Block]
   
December 31, 2014
   
June 30, 2015
 
   
Adjusted Cost
   
Gross Unrealized Gains
   
Fair Value
   
Adjusted Cost
   
Gross Unrealized Gains
   
Fair Value
 
                                                 
Municipal bonds and notes
  $ -     $ -     $ -     $ 10,003     $ 2     $ 10,005  
Financial institution instruments
    7,502       -       7,502       12,565       -       12,565  
Total available-for-sale investments
  $ 7,502     $ -     $ 7,502     $ 22,568     $ 2     $ 22,570  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Foreign Currency Translation Adjustment
   
Unrealized Gains on Available-For-Sale Investments
   
Total
 
                         
Balance, December 31, 2014
  $ 62     $ -     $ 62  
Other comprehensive income before reclassifications
    153       2       155  
Amounts reclassified out of accumulated other comprehensive income
    (82 )     -       (82 )
Balance, June 30, 2015
  $ 133     $ 2     $ 135  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended June 30,
 
   
2014
   
2015
 
   
Income
(Numerator)
   
Shares
(Denominator)
   
Per Share Amount
   
Income
(Numerator)
   
Shares
(Denominator)
   
Per Share Amount
 
Basic EPS:
                                               
Net income available to common stockholders
  $ 6,107                     $ 12,273                  
Less: undistributed earnings to participating securities
    (48 )                     -                  
Net income allocated to common stockholders
    6,059       11,821     $ 0.51       12,273       12,403     $ 0.99  
                                                 
Effect of dilutive securities:
                                               
Warrants to purchase common stock
    -       444               -       6          
Non-vested restricted stock
    -       40               -       52          
Plus: reallocation of undistributed earnings to participating securities
    2                       -                  
                                                 
Diluted EPS:
                                               
Net income allocated to common stockholders plus assumed conversions
  $ 6,061       12,305     $ 0.49     $ 12,273       12,461     $ 0.98  
   
Six Months Ended June 30,
 
   
2014
   
2015
 
   
Income
(Numerator)
   
Shares
(Denominator)
   
Per Share Amount
   
Income
(Numerator)
   
Shares
(Denominator)
   
Per Share Amount
 
Basic EPS:
                                               
Net income available to common stockholders
  $ 9,174                     $ 19,011                  
Less: undistributed earnings to participating securities
    (80 )                     -                  
Net income allocated to common stockholders
    9,094       11,592     $ 0.78       19,011       12,428     $ 1.53  
                                                 
Effect of dilutive securities:
                                               
Warrants to purchase common stock
    -       396               -       39          
Non-vested restricted stock
    -       62               -       46          
Plus: reallocation of undistributed earnings to participating securities
    4                       -                  
                                                 
Diluted EPS:
                                               
Net income allocated to common stockholders plus assumed conversions
  $ 9,098       12,050     $ 0.76     $ 19,011       12,513     $ 1.52