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Income Taxes - Schedule of Provision (Benefit) for Income Taxes Continuing Operations (Detail) - USD ($)
$ in Thousands
 8 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2015
Apr. 30, 2014
Apr. 30, 2013
Federal-        
Current $ 2,231 $ 2,899    
Current benefit of loss carryforwards (2,231) (2,899)    
Deferred 463 395 $ 1,262 $ (2,827)
Total 463 395 1,262 (2,827)
State-        
Current 500 1,112 219 1,040
Current benefit of loss carryforwards (402) (557)   (22)
Deferred 142 401 318 (717)
Total 240 956 537 301
Income before provision (benefit) for income tax, net $ 703 $ 1,351 $ 1,799 $ (2,526)