Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Accounts payable - trade	$ 2,611	$ 2,691
Accrued legal-related fees	626	854
Accrued employee compensation	1,385	2,082
Accrued interest	359	840
Accrued taxes payable	136	138
Short-term capital lease	147	144
Other accrued liabilities	929	727
Total accounts payable and accrued liabilities	$ 6,193	$ 7,476