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Notes Payable (Tables)
 12 Months Ended
Dec. 31, 2019
Debt Disclosure [Abstract]  
Future Maturities of the CRG Obligation
The following table represents future maturities of the notes payable obligation as of December 31, 2019:
2020$—  
2021—  
202213,846  
202318,462  
202418,462  
20259,230  
Total maturities$60,000  
Unamortized discount and loan costs(1,432) 
Total notes payable obligation$58,568