Annual report pursuant to Section 13 and 15(d)

Consolidated Financial Statement Detail - Additional Information 1 (Details)

v3.6.0.2
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