Leases - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended		15 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Oct. 31, 2016 Manufacturer	Dec. 31, 2019 USD ($)	[1]	Aug. 31, 2018 ft²
Leases [Abstract]
Weighted average discount rate, operating lease	6.40%		6.40%
Weighted average discount rate, finance lease	5.40%		5.40%
Weighted average remaining lease term, operating lease	1 year 6 months		1 year 6 months
Weighted average remaining lease term, finance lease	2 months 12 days		2 months 12 days
Right-of-use assets, operating leases	$ 9,336		$ 9,336			$ 7,705
Operating leases, rent expense	1,868	$ 1,943	5,628	$ 5,869
Irrevocable letter of credit	109		109
Number of manufacturers entered into finance lease arrangements | Manufacturer					2
Finance lease, right-of-use asset	188		188
Depreciation of finance lease assets	146	184	478	545
Finance lease, interest expense	1	13	13	55
Additional area subleased | ft²								14,380
Sublease income	$ 226	$ 570	$ 1,303	$ 1,711

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2019.