Consolidated Financial Statement Detail - Additional Information 1 (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 25,742	$ 65,767	$ 78,445	$ 101,659
Demand Deposits [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	21,500	23,200
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 4,200	$ 42,600