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Note 8. Stock Options and Restricted Stock Units (Tables)
12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Summary of stock options issued
  

Number of Options

Outstanding

 

Range of

Exercise Price

 

Weighted Average

Exercise Price

 

Aggregate

Intrinsic Value

Balance at December 31, 2014   258,171   $0.01 - 13.49   $7.32   $608,750 
    Options granted   10,000   $6.80   $6.80    —   
    Options exercised   (20,671)  $0.01 - 2.81   $2.55   $106,868 
   Options forfeited/cancelled   (1,500)  $9.26   $9.26    —   
Balance at December 31, 2015   246,000   $0.01 - 13.49   $7.69   $187,798 
    Options granted   —     $—     $—      —   
    Options exercised   (20,900)  $0.01 - 3.33   $1.67   $89,180 
    Options forfeited/cancelled   (61,250)  $7.76 - 9.26   $8.11    —   
Balance at December 31, 2016   163,850   $0.01 - 13.49   $8.30   $297,542 
Schedule Of Stock Options
      Options Outstanding    Options Exercisable 
 Exercise Price    Number    

Weighted Average

Exercise Price

    

Weighted Average

Remaining Contractual Life

(in Years)

    Number 
 $0.01 - $1.00     12,850   $0.01    5.05    12,850 
 $1.01 - $4.00     11,000   $3.33    5.25    11,000 
 $4.01 - $7.00     10,000   $6.80    8.88    2,500 
 $7.01 - $9.00     78,750   $7.76    3.70    63,751 
 $9.01 - $10.00     11,250   $9.26    7.99    6,670 
 $10.01 - $13.49     40,000   $13.49    2.19    27,500 
 Total    163,850   $8.30    4.15    124,271 
Schedule of Stock Options, Valuation Assumptions
  

Year ended

 December 31, 2015

Expected dividend yield   1.76%
Expected stock price volatility   158%
Weighted-average risk-free interest rate   1.84%
Weighted-average expected life of options (in years)   5.97 
Summary of restricted stock units issued
  

Number of Options

Outstanding

 

Weighted Average

Fair Value

 

Aggregate

Intrinsic Value

Balance at December 31, 2014   26,000   $9.26   $232,960 
   Units granted   110,000   $7.32    804,800 
   Units vested/issued   (25,000)  $7.20   $201,500 
   Units forfeited   (3,000)  $9.26    26,880 
Balance at December 31, 2015   108,000   $7.76   $626,400 
   Units granted   88,500   $5.28    467,300 
   Units vested/issued   (55,000)  $7.32   $379,588 
   Units forfeited   (15,000)  $6.61    111,941 
Balance at December 31, 2016   126,500   $6.35   $1,138,500