Balance Sheet Components (Property) (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Property and Equipment, net
Property and equipment, gross		$ 26,500,000	$ 26,500,000	$ 24,168,000
Less: Accumulated depreciation and amortization		(13,790,000)	(13,790,000)	(9,594,000)
Total Property and Equipment, net		12,710,000	12,710,000	14,574,000
Impairment of assets			1,557,000
Proceeds from sale of impaired machinery and equipment			463,000	15,000
Equipment pledged					$ 0
Machinery and equipment
Property and Equipment, net
Property and equipment, gross		20,670,000	20,670,000	18,632,000
Impairment of assets			1,000,000
Proceeds from sale of impaired machinery and equipment		500,000
Asset held for sale		200,000	200,000
Machinery and equipment | Subsequent Event
Property and Equipment, net
Proceeds from sale of impaired machinery and equipment	$ 200,000
Furniture and fixtures
Property and Equipment, net
Property and equipment, gross		217,000	$ 217,000	217,000
Useful Life			3 years
Computer equipment
Property and Equipment, net
Property and equipment, gross		911,000	$ 911,000	700,000
Useful Life			3 years
Capitalized software held for internal use
Property and Equipment, net
Property and equipment, gross		1,037,000	$ 1,037,000
Useful Life			3 years
Leasehold improvements
Property and Equipment, net
Property and equipment, gross		1,686,000	$ 1,686,000	1,036,000
Construction-in-process
Property and Equipment, net
Property and equipment, gross		$ 1,979,000	$ 1,979,000	$ 3,583,000
Minimum | Machinery and equipment
Property and Equipment, net
Useful Life			3 years
Maximum | Machinery and equipment
Property and Equipment, net
Useful Life			5 years