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Long-Term Reclamation Liability (Tables)
3 Months Ended
Mar. 31, 2019
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:
 
Three Months Ended
 
Twelve Months
 Ended
 
March 31, 2019
 
December 31, 2018
Long-term reclamation liability — beginning of period
$
7,441,091

 
$
7,417,680

Additional obligations incurred

 

Accretion of reclamation liability
5,710

 
23,411

Long-term reclamation liability — end of period
$
7,446,801

 
$
7,441,091