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Accrued Expenses (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Accrued Expenses [Abstract]    
Schedule of accrued expenses
  June 30,
2018		  December 31,
2017		 
Accrued licensing agreement fees $65,000  $120,000 
Accrued services  1,118,872   600,339 
Accrued issuance costs  30,933   28,083 
Accrued payroll  256,926   223,195 
Advances  —   50,000 
Other (1)  6,947   — 
  $1,478,678  $1,021,617 

 

(1)Accrued expenses include an obligation to issue stock options to a consultant that has met vesting requirements as of June 30, 2018 in the amount of $6,947. See Note 10 – Stock-Based Compensation for further detail.

 

  2017  2016 
Accrued license fees $120,000  $182,009 
Accrued services  600,339   31,186 
Accrued issuance costs  28,083   22,015 
Accrued payroll  223,195   28,252 
Advances  50,000   — 
Other  —   881 
  $1,021,617  $264,343