Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Accounts payable - trade	$ 1,865	$ 2,691
Accrued legal-related fees	352	854
Accrued employee compensation	556	2,082
Accrued interest	313	840
Accrued taxes payable	210	138
Short-term capital lease	147	144
Other accrued liabilities	917	727
Total accounts payable and accrued liabilities	$ 4,360	$ 7,476