Subsequent Events - Additional Information (Details) - Subsequent Event - Term Loan	May 02, 2019 USD ($) Tranche
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 150,000,000
Amount funded	$ 30,000,000
Number of additional tranches | Tranche	3
Remaining borrowing capacity	$ 120,000,000
Interest only payment period	36 months
Maturity date	May 01, 2024
Percentage of exit fee on amount borrowed on final repayment	1.75%
Percentage of exit fee on amount borrowed on partial prepayment	1.75%
Prepayment Occurs through First Anniversary of Closing Date
Subsequent Event [Line Items]
Percentage of prepayment fee	3.00%
First Anniversary of Closing Date through Second Anniversary of Closing Date
Subsequent Event [Line Items]
Percentage of prepayment fee	2.00%
Second Anniversary of Closing Date and Prior to May 1, 2024
Subsequent Event [Line Items]
Percentage of prepayment fee	1.00%
LIBOR
Subsequent Event [Line Items]
Basis spread on variable rate	6.15%
Interest rate	2.00%
Debt instrument, description of variable rate basis	Each term loan under the Credit Facility bears interest at an annual rate equal to the sum of (i) one-month LIBOR (customarily defined, with a change to prime rate if LIBOR funding becomes unlawful or impractical) plus (ii) 6.15%, subject to a LIBOR floor of 2.00%.
Tranche One
Subsequent Event [Line Items]
Remaining borrowing capacity	$ 40,000,000
Tranche Two
Subsequent Event [Line Items]
Remaining borrowing capacity	30,000,000
Tranche Three
Subsequent Event [Line Items]
Remaining borrowing capacity	$ 50,000,000