2. Summary of Significant Accounting Policies Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net loss	$ (86,077)	$ (26,438)	$ (31,139)	$ (25,936)	$ (81,666)	$ (10,740)	$ (32,235)	$ (23,674)	$ (169,590)	$ (148,315)
Denominator:
Weighted-average common shares, basic									7,827	5,333
Dilutive effect of stock options									0	0
Weighted-average common shares, diluted									7,827	5,333
Net loss per share, basic and diluted									$ (21.67)	$ (27.81)