Leases - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Dec. 31, 2019 USD ($) ft²	Mar. 31, 2020 USD ($)	Jan. 01, 2019 USD ($)
Lessee Lease Description [Line Items]
Right-of-use lease assets	$ 13,754	$ 18,239
Operating lease, initial lease liabilities		$ 19,463
Operating lease, weighted-average remaining lease term		69 months
Operating lease, expense		$ 1,000
Operating lease, payments		$ 800
Accounting Standards Update 2016-02
Lessee Lease Description [Line Items]
Right-of-use lease assets			$ 13,700
Operating lease, initial lease liabilities			$ 14,500
San Diego, California
Lessee Lease Description [Line Items]
Area of real estate property | ft²	21,180
Lease commencement date	Jan. 01, 2020
Lease expiration date	Dec. 31, 2025
Lessee, operating lease, renewal term	5 years
Lessee, operating lease, existence of option to extend	true
Operating leases, remaining lease term		69 months