Quarterly report pursuant to Section 13 or 15(d)

Restricted Cash (Details)

v3.10.0.1
Restricted Cash (Details) - USD ($)
$ in Thousands
1 Months Ended
Apr. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Dec. 31, 2016
Restricted Cash          
Restricted cash, security deposit   $ 300 $ 500    
Refund received from landlord of security deposit on lease $ 200        
Reconciliation of cash, cash equivalents, and restricted cash          
Cash and cash equivalents   114,386 32,205 $ 79,531 $ 58,588
Restricted cash, current portion     193    
Restricted cash, long-term   290 290 483 483
Total cash, cash equivalents and restricted cash   $ 114,676 $ 32,688 $ 80,014 $ 59,071