Leases (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($) ft²	Sep. 30, 2019 USD ($) ft² location	Jun. 30, 2019 USD ($) ft²
Lessee, Lease, Description [Line Items]
Operating lease liabilities, current portion included in other accrued liabilities	$ 5,536	$ 5,536
Operating lease liabilities, long-term portion	27,825	27,825
Operating lease liabilities	$ 33,361	$ 33,361
Weighted average remaining lease term	3 years 2 months 5 days	3 years 2 months 5 days
Weighted average discount rate (as a percent)	10.77%	10.77%
Lease expense	$ 2,000	$ 5,800
Impairment of right-of-use assets	400	$ 361
Operating lease payments	$ 2,200
Corporate Headquarters Lease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	113,000	113,000
Number of office space locations | location		2
Term of lease	84 months	84 months
Renewal term of lease	5 years	5 years
"First Space" Sublease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	88,000	88,000
"Second Space" Sublease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	25,000	25,000
Corporate Headquarters Sublease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²			25,879
Term of lease			48 months
Sublease receivable			$ 1,900
Tukwila, WA lease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	10,000	10,000
Term of lease	62 months	62 months
Renewal term of lease	5 years	5 years
Austin TX, Long-term Lease
Lessee, Lease, Description [Line Items]
Office space (area) | ft²	94,000	94,000
Term of lease	132 months	132 months