XML 68 R48.htm IDEA: XBRL DOCUMENT v3.19.1
Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Accrued expenses and other current liabilities:    
Research and development related costs $ 5,032 $ 2,308
Payroll and related costs 7,427 4,426
Accounting, tax and audit services 398 231
Other 1,645 1,159
Total other current liabilities $ 14,502 $ 8,124