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Note 4. Equity (Tables)
6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Stock options outstanding and exercisable
   Options Outstanding  Options Exercisable
Exercise Price Range  Number 

Weighted Average

Remaining Contractual

Life (in Years)

 

Weighted Average

Exercise Price

  Number
0.01 - 7.00    10,000    5.39   $6.80    10,000 
7.01 - 8.00    20,313    3.24   $7.76    20,313 
8.01 - 12.00    8,167    6.70   $9.99    4,167 
12.01 - 15.00    57,000    7.87   $13.09    44,500 
15.01 - 17.40    32,000    7.92   $17.40    32,000 
 Total    127,480    6.87   $12.63    110,980 
Shares repurchased
   Shares Repurchased
Period  Total Number of Shares Repurchased  Average Price Paid Per Share  Total Number of Shares Purchased as Part of Publicly Announced Program  Maximum Dollar Value of Shares that May Yet Be Purchased Under the Program
 August 7 -31, 2019    22,150   $9.34    22,150   $793 
 September 1-30, 2019    2,830   $10.00    2,830   $765 
 October 1-31, 2019    39,363   $10.44    39,363   $354 
 November 1-30, 2019    11,827   $10.43    11,827   $231 
 December 1-31, 2019    —      —      —     $231 
 January 1-31, 2020    —      —      —     $231 
 February 1-29, 2020    —      —      —     $231 
 March 1-31, 2020    21,700   $9.33    21,700   $1,028 
 April 1-30, 2020    22,698   $9.02    22,698   $823 
 May 1-31, 2020    39,500   $9.51    39,500   $448 
 June 1-30, 2020    —      —      —     $448 
 Total    160,068   $9.70    160,068   $448