Annual report pursuant to Section 13 and 15(d)

Cash Equivalents and Marketable Securities (Details)

v3.6.0.2
Cash Equivalents and Marketable Securities (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
item
Dec. 31, 2015
USD ($)
Cash Equivalents and Marketable Securities    
Marketable Securities, Unrealized Losses $ 9  
Total, Amortized Cost 83,602  
Total, Fair Value 83,593  
Realized gains (losses) $ 0  
Number of investments adjusted for other-than-temporary declines in fair value | item 0  
Unrealized Loss Position    
Number of securities in unrealized loss position for less than twelve months | item 10  
Fair value of securities held by Company in an unrealized loss position for less than twelve months $ 25  
Number of securities with an other-than-temporary impairment | item 0  
Money market funds    
Cash Equivalents and Marketable Securities    
Cash Equivalents, Amortized Cost $ 58,588 $ 35,909
Cash Equivalents, Fair value 58,588 $ 35,909
U.S treasury obligations    
Cash Equivalents and Marketable Securities    
Marketable Securities, Amortized Cost 25,014  
Marketable Securities, Unrealized Losses 9  
Marketable Securities, Fair Value $ 25,005