Balance Sheet Components - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) ft²
Balance Sheet Components [Abstract]
Depreciation and amortization expense, excluding amortization of capitalized software and intangible assets	$ 5,862,000	$ 3,444,000	$ 2,371,000
Capitalized software development costs	135,000	185,000	907,000
Amortized capitalized software development costs	317,000	791,000	$ 835,000
Integrated Acquired Technology Writeoff		160,000
Net book value of capitalized software development costs	351,000	535,000
Square foot office building in San Luis Obispo, California | ft²			64,000
Building construction costs	855,000	11,924,000	$ 3,659,000
Financing obligation	$ 16,236,000
Lease expiration term	The lease has an original term of 15 years and the Company also has an option to extend the term of the lease for three consecutive terms of five years each.
Lease term	15 years
Restricted cash	$ 0	$ 772,000	$ 2,533,000