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Stock Warrants (Details 1) - Warrant [Member] - $ / shares
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Number    
Outstanding and exercisable at beginning of the year 820,312 820,312
Issued during the year
Exercised during the year
Cancelled or expired during the year
Outstanding and exercisable at end of the year 820,312 820,312
Weight average exercise price    
Outstanding and exercisable at beginning of the year $ 1.71 $ 1.71
Issued during the year
Exercised during the year
Cancelled or expired during the year
Outstanding and exercisable at end of the year 1.71 1.71
Range of exercise price, lower range limit 1.70 1.70
Range of exercise price, upper range limit $ 2.00 $ 2.00