Income Taxes - Difference Between Total Income Taxes Expense and Amount Computed at Statutory Federal Income Tax Rate (Detail) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Book loss before income taxes of the TRS	$ (8,167)	$ (6,040)	$ (4,261)
Statutory rate applied to pre-tax income	(1,715)	(1,268)	(1,449)
Effect of state and local income taxes, net of federal tax benefit	(347)	(200)	(108)
Tax reform impact	0	0	644
Provision to return adjustment	0	0	5
Permanent adjustments	8	12	13
Change in valuation allowance	2,100	1,456	1,289
Valuation allowance release	0	(28)	0
Other	(46)	0	2
Total tax expense (benefit)	$ 0	$ (28)	$ 396
Effective tax rate	0.00%	0.46%	(9.29%)