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Long-Term Reclamation Liability (Tables)
6 Months Ended
Jun. 30, 2018
Asset Retirement Obligation Disclosure [Abstract]  
Reconciliation of the Aggregate Reclamation Liability
Following is a reconciliation of the aggregate reclamation liability associated with our reclamation plan for our mining projects:
 
Six Months Ended
 
Twelve Months
 Ended
 
June 30, 2018
 
December 31, 2017
Long-term reclamation liability — beginning of period
$
7,417,680

 
$
7,353,346

Additional obligations incurred

 

Accretion of reclamation liability
11,054

 
64,334

Long-term reclamation liability — end of period
$
7,428,734

 
$
7,417,680