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Stock Warrants (Tables)
 6 Months Ended
Jun. 30, 2019
Stock Warrants [Line Items]  
Schedule of stock warrant activities
  

Three Months Ended

June 30, 2019

 
   Number  

Weight

average

exercise

price

 
Outstanding and exercisable at beginning of the period   820,312   $1.71 
Issued during the period   -    - 
Exercised during the period   -    - 
Cancelled or expired during the period   -    - 
Outstanding and exercisable at end of the period   820,312   $1.71 
Range of exercise price   $1.70 to $2.00
Date Of Issuance Three September Two Thousand Fourteen To Twenty Six June Two Thousand Nineteen [Member]  
Stock Warrants [Line Items]  
Schedule of fair value of warrants issued estimated by using Binominal pricing model
Terms of warrants   5 years 
Expected volatility   72.0 
Risk-free interest rate   1.69 
Expected dividend yield   0.81
Date Of Issuance Twenty Seventh August Two Thousand Fourteen To Two September Two Thousand Nineteen [Member]  
Stock Warrants [Line Items]  
Schedule of fair value of warrants issued estimated by using Binominal pricing model
Terms of warrants   4.81 years 
Expected volatility   69.8 
Risk-free interest rate   1.62 
Expected dividend yield   0.81