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Credit Facility and Term Loans - Schedule of Credit Facility and Term Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]        
Total MidCap credit facility $ 13,418 $ 21,657    
Less: deferred debt issuance costs (500)   $ (200)  
Less-current portion (6,500) (3,000)    
Term loan-non current portion 6,350 10,467    
Horizon Term Loan        
Debt Instrument [Line Items]        
Horizon term loan 14,000 15,000    
Less: deferred debt issuance costs (628) (836)   $ (1,000)
Less discount associated with issuance of warrants (522) (697)    
Total Horizon term loan 12,850 13,467    
Less-current portion (6,500) (3,000)    
Term loan-non current portion 6,350 10,467    
Mid Cap Credit Facility        
Debt Instrument [Line Items]        
MidCap credit facility 14,184 22,953    
Less: deferred debt issuance costs (749) (1,268)    
Less discount associated with issuance of warrants (17) (28)    
Total MidCap credit facility $ 13,418 $ 21,657