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Stock Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of activity of stock incentive and equity plans
   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, 2018   274,494    125,564    19.53    97,692    22,384 
Granted   (47,953)   10,000    —    1,878    36,075 
Exercised/issued   —    (938)   6.10    —    (5,300)
Canceled/forfeited   68,526    (65,543)   31.66    —    (2,983)
Outstanding at December 31, 2018   295,067    69,083    12.10    99,570    50,176 
Granted   (60,925)   1,000    —    —    925 
Exercised/issued   —    

—

   —    —    (6,098)
Canceled/forfeited   47,244    (47,244)   11.35    —    — 
Outstanding at December 31, 2019   281,386    22,839   $13.48    99,570    45,003 
Schedule of fair value of common stock on the date of grant
Date of grant   Number of
options
granted		     Exercise
price		     Intrinsic
value
per share		  
May 2019     1,000     $ 8.34       —  
Schedule of exercise prices of outstanding options
Exercise price  Number of
options
outstanding		   Average
remaining
contractual life
(years)		   Number of
options
exercisable		 
$6.10 - $13.50   20,500    6.75    14,634 
$40.10 - $44.10   1,850    4.94    1,850 
$77.50 - $121.10   —    —    — 
$194.90 - $226.90   489    0.44    489 
    22,839    4.86    17,973 
Schedule of non-vested options
   Non-vested
options		   Weighted-
average option
exercise
price		 
Non-vested at January 1, 2018   46,842   $8.26 
Granted   10,000    7.77 
Vested   (8,413)   9.04 
Cancelled   (26,437)   8.99 
Non-vested at December 31, 2018   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   $5.79 
Schedule of estimated fair value at the date of option grant using the Black-Scholes option-pricing model
  2019  
Weighted-average fair value per option   $ 6.09  
Expected term     5.1 years  
Risk-free interest rate     2.95%  
Volatility     47%  
Dividend yield     None  
Forfeiture rate     24.43 %
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 %
Summary of restricted stock units

The following table summarizes the award vesting terms for the RSUs granted in 2019:

 

Number of RSUs   Target price  
925   $ 7.95  

 

The following table summarizes the award vesting terms for the RSUs granted in 2018:

 

Number of restricted stock units   Target price  
902   $ 11.00  
15,000   $ 12.50  
15,000   $ 14.00  
Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of restricted stock units
   RSUs
outstanding		   Weighted-average
price at
time of grant		   Aggregate intrinsic
value		 
Non-vested RSUs as of January 1, 2018   22,384   $4.65      
Granted   36,075        7.88          
Vested   (5,300)   8.51      
Cancelled   (2,983)   8.88      
Non-vested RSUs as of December 31, 2018   50,176    6.31      
Granted   9,925    8.32      
Vested   (6,098)   7.40      
Cancelled   —    —      
Non-vested RSUs at December 31, 2019   54,003   $6.56   $354,250 
Restricted Stock Units (RSUs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of restricted stock units
Non-vested restricted stock as of January 1, 2018   4,904 
Granted   1,878 
Vested   (4,328)
Non-vested restricted stock as of December 31, 2018   2,454 
Granted   — 
Vested   (2,454)
      
Non-vested restricted stock as of December 31, 2019   —