Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Accounts payable - trade	$ 2,118	$ 2,611
Accrued legal-related fees	282	626
Accrued employee compensation	867	1,385
Accrued interest	22	359
Accrued taxes payable	163	136
Short-term capital lease	147	147
Other accrued liabilities	1,399	929
Total accounts payable and accrued liabilities	$ 4,998	$ 6,193