8. Stockholders’ Equity (Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
Option Shares
Outstanding at December 31, 2015 | shares	703
Granted | shares	328
Exercised | shares	0
Cancelled | shares	(372)
Expired | shares	0
Outstanding at September 30, 2016 | shares	659
Vested and expected to vest, as of September 30, 2016 | shares	598
Vested and exercisable, as of September 30, 2016 | shares	235
Option Average Exercise Price
Outstanding at December 31, 2015 | $ / shares	$ 55.42
Granted | $ / shares	19.64
Exercised | $ / shares	0
Cancelled | $ / shares	49.19
Expired | $ / shares	0
Outstanding at June 30, 2016 | $ / shares	41.13
Vested and expected to vest, as of September 30, 2016 | $ / shares	41.99
Vested and exercisable, as of September 30, 2016 | $ / shares	$ 50.87
Option Weighted Average Remaining Contractual Life Years
Options outstanding at September 30, 2016	8 years 108 days
Options vested and expected to vest, as of September 30, 2016	8 years 108 days
Options vested and exercisable, as of September 30, 2016	7 years 144 days
Option Aggregate Intrinsic Value
Exercised | $	$ 0
Options outstanding at September 30, 2016 | $	37
Options vested and expected to vest as of September 30, 2016 | $	28
Options vested and exercisable as of September 30, 2016 | $	$ 0