Annual report pursuant to Section 13 and 15(d)

Accounts Payable, Accrued and Other Liabilities - Components of Accounts Payable, Accrued and Other Liabilities (Detail)

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Accounts Payable, Accrued and Other Liabilities - Components of Accounts Payable, Accrued and Other Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Accounts payable $ 5,295 $ 2,283
Accrued compensation 1,503 1,127
Accrued expenses 1,195 938
Accounts payable and accrued liabilities $ 7,993 $ 4,348