Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Financial Statements Detail - Additional Information 1 (Details)

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Condensed Consolidated Financial Statements Detail - Additional Information 1 (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents $ 20,618 $ 65,767 [1] $ 32,046 $ 78,445
Demand Deposits [Member]        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents 4,100 23,200    
Money Market Funds [Member]        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents $ 16,500 $ 42,600    
[1] The condensed consolidated balance sheet as of December 31, 2015 has been derived from the audited consolidated financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.