XML 40 R24.htm IDEA: XBRL DOCUMENT v3.7.0.1
Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2016
Shareholders' Equity [Abstract]  
Summary of the status of the 2011 share incentive plan
   Years ended December 31, 
   2 0 1 6  2 0 1 5  2 0 1 4 
   Number  Weighted average exercise price  Number  Weighted average exercise price  Number  Weighted average exercise price 
                    
 Options outstanding at beginning of year  710,300  $2.51   851,600  $2.63   460,000  $1.93 
 Changes during year:                        
 Granted (a)  344,000  $0.003   116,800  $1.66   666,000  $2.81 
 Exercised  (59,000) $1.45   (92,100) $1.85   (225,400) $1.88 
 Forfeited  (117,800) $2.49   (166,000) $2.88   (49,000) $2.03 
 Expired  (2,000) $2.16   -   -   -   - 
                          
 Options outstanding at end of year  875,500  $1.60   710,300  $2.51   851,600  $2.63 
                          
 Options exercisable at end of year  246,500  $2.87   51,000  $1.98   43,600  $2.00 
 Vested and expected to vest at end of year  771,084  $1.81                 
                          
 Weighted average grant date fair value of options granted during the year (b)     $1.46      $0.94      $0.51 
Summary of fair value of each stock option granted is computed on the date of grant according to the Black-Scholes option-pricing model
   Years ended December 31, 
   2 0 1 6  2 0 1 5  2 0 1 4 
           
 Dividend yield  11%  10%  11%
              
 Expected volatility*  35%  48%  44%
              
 Average risk-free interest rate  2.0%  1.5%  1.5%
              
 Expected average term - in years  3.88   3.88   3.88 

 

 *Volatility is based on historical volatility of the Company's share price for periods matching the expected term of the option until exercise.
Summarizes information about options outstanding and exercisable
   Options Outstanding  Options Exercisable 
   Number  Weighted     Number  Weighted    
   outstanding  average  Weighted  exercisable  average  Weighted 
 Range of at  remaining  average  at  remaining  average 
 exercise December 31,  contractual  exercise  December 31,  contractual  exercise 
 prices 2 0 1 6  life  price  2 0 1 6  life  price 
      Years        Years    
                    
 $ 0.003 – 2.160  423,000   4.33  $0.18   19,000   1.18  $2.16 
 $ 2.410 – 2.947  452,500   2.81  $2.93   227,500   2.75  $2.93 
    875,500   3.54  $1.60   246,500   2.63  $2.87