Accrued Liabilities - Components of Other Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]
Asset retirement obligations	$ 358	$ 379
Accrued outside services	1,049	869
Accrued accounting and legal	212	653
Accrued recognition awards	327	294
Accrued other	851	855
Deferred rent	77	88
Escheat liability	5	78
Lease incentive	152	87
Dividends payable for 2009 LTIP	0	1,481
Royalty payable	0	111
Total accrued other	$ 3,031	$ 4,895