Income Taxes - Components of the Provision for Income Taxes from Continuing Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Current tax (benefit) expense:    
Federal $ (67) $ 0
State 15 40
Total current (52) 40
Deferred tax (benefit) expense:    
Federal (321) 86
State (17) 2
Total deferred (338) 88
Total (benefit) provision for income taxes $ (390) $ 128