Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net operating losses, at TRSs	$ 1,647
Other	708	$ 2,322
Total deferred tax assets	2,355	2,322
Valuation allowance	(2,328)	(1,778)
Net deferred tax assets	27	544
Other	(57)	(91)
Deferred tax (liabilities)	(57)	(91)
Net deferred tax liabilities	$ (30)
Net deferred tax assets		$ 454