Quarterly report pursuant to Section 13 or 15(d)

Restricted Cash - Reconciliation (Details)

v3.19.2
Restricted Cash - Reconciliation (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Cash And Cash Equivalents [Abstract]        
Cash and cash equivalents $ 101,740 $ 49,886 $ 114,386 $ 32,205
Restricted cash, current portion 638 638   193
Restricted cash, net of current portion 3,376 290 290 290
Total cash, cash equivalents and restricted cash $ 105,754 $ 50,814 $ 114,676 $ 32,688