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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2018
Stockholders' Equity Note [Abstract]  
Schedule of stock option activity and related information

   2018   2017   2016 
   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   314,125   $3.39    252,670   $6.21    238,894   $6.65 
Changes during the year:                              
Granted   108,000   $2.39    75,000   $2.13    30,000   $2.13 
Exercised   -   $-    -   $-    (10,000)  $2.96 
Forfeited   (101,250)  $4.85    (13,545)  $49.09    (6,224)  $8.56 
                               
Outstanding - year end   320,875   $2.59    314,125   $3.39    252,670   $6.21 
                               
Vested and expected to vest   167,874   $2.90    192,584   $4.10    154,333   $8.44 
Exercisable at year end   157,874   $2.89    182,584   $4.17    144,333   $8.82 
Schedule of options granted to employees and directors

Exercise Price  Options
outstanding
as of
December 31,
2018		   Weighted
average
remaining
contractual
life (years)		   Options
exercisable
as of
December 31,
2018		   Weighted average
Remaining
Contractual
life of options
exercisable
(years)		 
                 
2.126   30,000    2.86    20,001    2.86 
2.131   67,500    3.93    22,498    3.93 
2.237   26,625    1.81    26,625    1.81 
2.388   108,000    4.25    -    - 
2.96   73,000    1.45    73,000    1.45 
3.88   375    0.88    375    0.88 
4.02   5,000    0.54    5,000    0.54 
6.67   10,000    0.28    10,000    0.28 
6.67   375    0.28    375    0.28 
                     
Grand Total   320,875    3.02    157,874    1.93