Balance Sheet Components (Goodwill and Intangibles) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Goodwill
Goodwill	$ 17,551		$ 17,551		$ 14,278
Accumulated impairment losses	(14,278)		(14,278)		(14,278)
Goodwill	3,273		3,273
Goodwill acquired (Note 3)			3,273
Other intangible assets
Less accumulated amortization	(1,947)		(1,947)		(1,660)
Intangible assets, net	3,796		3,796		53
Amortization expense	212	$ 16	286	$ 31
Estimated amortization expense
Remainder of 2016	420		420
2017	813		813
2018	612		612
2019	464		464
2020	353		353
Intangible assets, net	2,662		2,662
Acquired FDA non-gel product approval
Other intangible assets
Finite-lived assets, gross	1,713		1,713		$ 1,713
Customer relationships
Other intangible assets
Finite-lived assets, gross	3,200		3,200
Trade name
Other intangible assets
Finite-lived assets, gross	800		800
Non-compete agreement
Other intangible assets
Finite-lived assets, gross	$ 30		$ 30