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7. Stock Based Compensation (Tables)
3 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Restricted stock outstanding
   Shares  Weighted average grant date price
 Non-vested, December 31, 2019    255,634   $7.18 
 Granted    18,706    7.15 
 Vested    (14,057)   6.69 
 Non-vested, March 31, 2020    260,283    7.32 
Stock options outstanding
   Number of shares underlying options  Weighted average exercise price per share  Weighted average grant date fair value
 Outstanding, December 31, 2019    29,165   $7.20   $3.46 
 Granted    —      —      —   
 Forfeited    —      —      —   
 Exercised    —      —      —   
 Outstanding, March 31, 2020    29,165    7.20    3.76 
Nonvested stock options outstanding
   Number of shares underlying options  Weighted average exercise price per share  Weighted average grant date fair value
 Non-vested, December 31, 2019    5,416   $5.48   $3.01 
 Granted    —      —      —   
 Forfeited    —      —      —   
 Vested    —      —      —   
 Non-vested, March 31, 2020    5,416    5.48    3.01 
Intrinsic value
   Number of shares underlying options  Weighted average exercise price per share  Weighted average remaining contractual life (years)  Aggregate intrinsic value
 Outstanding    29,165   $7.20    4.47   $36,171 
 Exercisable    23,749    7.59    3.64    32,334