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Stock Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of award vesting terms for the RSUs granted
   Shares
available
for
grant		   Number of
options
outstanding		   Weighted-
average
option
exercise price		   Number of
restricted
stock shares
issued		   Number of
RSUs
outstanding		 
Outstanding at January 1, 2019   295,067    69,083    12.10    99,570    50,176 
Granted   (60,925)   1,000    —    —    9,925 
Exercised/issued   —    (5,000)   —    —    (6,098)
Canceled/forfeited   42,244    (42,244)   11.35    —    — 
Outstanding at December 31, 2019   276,386    22,839    13.48    99,570    54,003 
Granted   (20,877)   —    —    —    3,597 
Exercised/issued   —    (2,250)   —    —    (3,597)
Canceled/forfeited   40,596    (489)   202.56    —    (9,000)
Outstanding at December 31, 2020   296,105    20,100   $9.71    99,570    45,003 
Schedule of exercise prices of outstanding options
Exercise price  Number of
options
outstanding		   Average
remaining
contractual life
(years)		   Number of
options
exercisable		 
$6.10 - $8.34   18,250    5.75    18,250 
$44.10   1,850    3.94    1,850 
                
    20,100    4.73    20,100 
Schedule of non-vested options
   Non-
vested
options		   Weighted-
average option
exercise
price		 
Non-vested at January 1, 2019   21,992   $6.86 
Granted   1,000    8.34 
Vested   (10,878)   7.07 
Cancelled   (7,248)   7.25 
Non-vested at December 31, 2019   4,866    6.10 
Granted   —    — 
Vested   (4,866)   6.10 
Cancelled   —    — 
Non-vested at December 31, 2020   —   $— 
Schedule of award vesting terms for the RSUs granted
Number of RSUs   Target price  
925   $ 7.95  
         
Number of restricted stock units  Target price 
902  $11.00 
15,000  $12.50 
15,000  $14.00 
Schedule of fair value of restricted stock units
   Granted 
   January
2018		   March
2017		 
Daily expected stock price volatility   4.2806%   4.4237%
Daily expected mean return on equity   (0.2575)%   (0.2226)%
Daily expected dividend yield   0.0%   0.0%
Average daily risk-free interest rate   0.0078%   0.0063%
Schedule of award vesting terms for the RSUs granted
   RSUs
outstanding		   Weighted-average
price at
time of grant		   Aggregate
intrinsic
value		 
Non-vested RSUs as of January 1, 2019   50,176   $6.31      
Granted   9,925    8.32      
Vested   (6,098)   7.40      
Cancelled   —    —      
Non-vested RSUs as of December 31, 2019   54,003    6.56      
Granted   3,597    8.34      
Vested   (3,597)   8.34      
Cancelled   (9,000)   8.36      
Non-vested RSUs at December 31, 2020   45,003   $6.20   $278,961