Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) ft² lease location
Lessee, Lease, Description [Line Items]
Number of subleases | lease	3
Operating lease liabilities, current portion included in other accrued liabilities	$ 5,739
Operating lease liabilities, long-term portion	26,297
Operating lease liabilities	$ 32,036
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Liabilities
Weighted average remaining lease term	3 years 14 days
Weighted average discount rate (as a percent)	10.77%
Lease expense	$ 7,800
Impairment of right-of-use assets	400
Operating lease payments	$ 8,600
Corporate Headquarters Lease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	136,000
Number of office space locations | location	2
Renewal term of lease	5 years
"First Space" Sublease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	88,000
"Second Space" Sublease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	48,000
Term of lease	84 months
San Carlos, CA lease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	25,879
Term of lease	48 months
Lease expense	$ 1,900
Tukwila, WA lease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	10,000
Term of lease	62 months
Renewal term of lease	5 years
Austin TX, Long-term Lease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	94,000
Term of lease	132 months