Commitments and Contingencies - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($) ft²	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($) ft²	Dec. 31, 2019 USD ($)	Nov. 30, 2017 ft²	Aug. 31, 2014 ft²
Loss Contingencies [Line Items]
Right-of-use assets obtained in exchange for operating lease liabilities	$ 0	$ 0	$ 3,000,000.0	$ 0
Right-of-use asset	6,800,000		6,800,000		$ 4,200,000
Cash paid for operating lease liabilities	300,000	200,000	600,000	400,000
Amortization of the ROU asset	$ 200,000	100,000	$ 400,000	100,000
Weighted-average remaining lease terms for operating leases	7 years 4 months 24 days		7 years 4 months 24 days		7 years 9 months 18 days
Weighted-average discount rate on operating leases (as a percent)	6.90%		6.90%		7.25%
Period after first sale royalty is due			12 years
Net revenue due as royalty (as a percent)			4.00%
Revenues	$ 15,213,000	1,488,000	$ 41,509,000	2,565,000
Royalty expense	600,000	$ 100,000	1,600,000	$ 100,000
Maximum
Loss Contingencies [Line Items]
Royalty commitments	$ 200,000		$ 200,000
First Lease
Loss Contingencies [Line Items]
Term of operating lease contract							5 years
Net rentable area (square feet) | ft²							12,215
Second Lease
Loss Contingencies [Line Items]
Term of operating lease contract						7 years
Net rentable area (square feet) | ft²						25,548
Renewal term of operating lease						5 years
Third Lease
Loss Contingencies [Line Items]
Term of operating lease contract		8 years		8 years
Net rentable area (square feet) | ft²		32,621		32,621
Renewal term of operating lease		5 years		5 years