Long-term Debt (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2019

Dec. 31, 2018

Debt Disclosure [Abstract]

Future Maturities Under the Term Loan Agreement

Future maturities under the term loan agreement as of March 31, 2019 are as follows (in thousands):

Period Ending December 31:	Amount
2019	$	2,696
2020	3,677
2021	3,771
2022	52,510
	62,654
Add: Accretion of closing fees	958
	63,612
Less: Amount representing interest	(18,841		)
Less: Amount representing debt discount and debt issuance costs	(174		)
Present value of minimum payments	$	44,597

Future maturities under the term loan agreement as of December 31, 2018 are as follows (in thousands):

Year Ending December 31:	Amount
2019	$	3,566
2020	3,677
2021	3,771
2022	52,510
	63,524
Add: Accretion of closing fees	872
	64,396
Less: Amount representing interest	(20,010		)
Less: Amount representing debt discount and debt issuance costs	(185		)
Present value of minimum payments	$	44,201