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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2018
Stockholders' Equity Note [Abstract]  
Schedule of outstanding warrants to shareholders

Outstanding and

exercisable

warrants

 

Weighted average

exercise price

of outstanding

warrants

 

Weighted

average Remaining contractual
life (years)

300,000  3.30  2.82
Schedule of stock option activity

   2019   2018   2017 
   Number
of
options		   Weighted-
average exercise price		   Number
of
options		   Weighted average exercise price   Number
of
options		   Weighted-
average exercise price		 
                         
Outstanding - beginning of year   320,875   $2.59    314,125   $3.39    252,670   $6.21 
Changes during the year:                              
Granted   95,000   $2.13    108,000   $2.39    75,000   $2.13 
Exercised   (125,195)  $2.52    -   $-    -   $- 
Forfeited   (43,806)  $3.65    (101,250)  $4.85    (13,545)  $49.09 
                               
Outstanding - year end   246,874   $2.26    320,875   $2.59    314,125   $3.39 
                               
Vested and expected to vest   148,498   $2.41    167,874   $2.90    192,584   $4.10 
Exercisable at year end   79,372   $2.38    157,874   $2.89    182,584   $4.17 
Schedule of options granted to employees and directors
               Weighted average 
   Options   Weighted   Options   Remaining 
   outstanding   average   exercisable   Contractual 
   as of   remaining   as of   life of options 
Exercise  December 31,   contractual   December 31,   exercisable 
Price  2019   life (years)   2019   (years) 
                 
2.118   87,500    4.83    -    - 
2.126   9,999    1.86    9,999    1.86 
2.131   45,002    2.93    22,501    2.93 
2.287   7,500    4.08    -    - 
2.388   83,500    3.19    33,499    2.67 
2.960   13,373    0.81    13,373    0.81 
                     
Grand Total   246,874    3.02    79,372    1.93