Summary of Significant Accounting Policies and Recent Accounting Standards - Cash and Restricted Cash (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 23,440	$ 2,563
Restricted Cash	204	204
Total cash, cash equivalents and restricted cash	$ 23,644	$ 2,767	$ 3,754