Discontinued Operations - Schedule of Cash Flows for Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities:
Net loss		$ (214)
Depreciation		106
Deferred tax provision		(101)
Stock compensation		21
Prepaid expenses and other assets		14
Net cash used in operating activities	$ 0	(174)
Investing Activities:
Capital expenditures		(1)
Net cash used in investing activities	0	(1)
Net cash flows used in discontinued operations	$ 0	$ (175)