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8. Stock Plans (Tables)
12 Months Ended
Dec. 31, 2015
Compensation Related Costs [Abstract]  
Option Transaction
Options   Shares     Weighted Average Exercise Price   Weighted Average Remaining Contractual Term
Outstanding at December 31, 2014     50,000     $ 204.76    
Granted     --       --    
Exercised     --       --    
Outstanding at December 31, 2015     50,000     $ 204.76   2.9 years
Exercisable at December 31, 2015     35,000     $ 201.43   2.8 years
Restricted Stock Activity
Nonvested Shares  

 

 Shares

    Weighted Average Award Date Fair Value Per Share  
Restricted stock at December 31, 2014     7,500     $ 209.42  
Granted in 2015     --       --  
Vested in 2015     (3,000 )   $ 204.76  
Restricted stock at December 31, 2015     4,500     $ 212.53  
Changes in Stock Units
Nonvested Stock Units  

 

Restricted Stock Units

    Weighted Average Award Date Fair Value Per Unit    

 

Director’s Stock Units

    Weighted Average Award Date Fair Value Per Unit  
Nonvested at December 31, 2014     14,858     $ 222.81       --        
Granted     570     $ 391.06       15     $ 348.16  
Vested     --               (15 )   $ 348.16  
Nonvested at December 31, 2015     15,428     $ 229.02       --          
Unrecognized Compensation Cost
    Unrecognized Compensation Cost    

Weighted Average

Remaining Years in Amortization Period

 
Stock options   $ 362,000       1.2  
Restricted stock     584,000       1.2  
Restricted stock units     1,134,000       3.0  
Total   $ 2,080,000