XML 78 R63.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments and Contingencies - Narrative (Details) - USD ($)
12 Months Ended
Aug. 01, 2017
Apr. 19, 2017
Oct. 21, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]            
Operating leases, rent expense, net       $ 2,372,000 $ 2,561,000 $ 2,283,000
Future Minimum Rental Payments Due            
2018       3,677,000    
2019       1,850,000    
2020       2,182,000    
2021       1,326,000    
2022       $ 942,000    
Insurance deductible     $ 250,000      
OSHA, loss in period   $ 138,000        
Payments for legal settlements   $ 75,000        
Civil penalties sought $ 250,000