Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Payables And Accruals [Abstract]
Accounts payable — trade	$ 2,760	$ 6,460
Accrued legal-related fees	2,237	2,999
Deferred revenue		1,000
Accrued employee compensation	947	818
Other accrued liabilities	1,489	1,753
Total accounts payable and accrued liabilities	$ 7,433	$ 13,030