Segment and Geographic Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | segment	1
Net revenue	$ 7,771	$ 17,465
Percentage of revenue by geographic segments	100.00%	100.00%
Long-lived assets	$ 578,103		$ 309,679
Percentage of long-lived assets by geographic segments	100.00%		100.00%
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 7,202	$ 15,405
Percentage of revenue by geographic segments	92.70%	88.20%
Long-lived assets	$ 577,782		$ 308,843
Percentage of long-lived assets by geographic segments	99.90%		99.70%
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 294	$ 1,895
Percentage of revenue by geographic segments	3.80%	10.90%
Long-lived assets	$ 321		$ 836
Percentage of long-lived assets by geographic segments	0.10%		0.30%
Rest of world
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 275	$ 165
Percentage of revenue by geographic segments	3.50%	0.90%