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INCOME TAXES (NOL) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
item
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Operating loss and contribution carryforwards      
Reversal of valuation allowance $ 0.7    
Number of state taxing authorities for which the entity is under examination | item 3    
State      
Operating loss and contribution carryforwards      
Operating loss carryforwards   $ 7.9  
Contribution carryforwards   $ 1.1  
Majority of state net operating loss and contribution carryforwards, expiration period one   15 years  
Majority of state net operating loss and contribution carryforwards, expiration period two   20 years  
Valuation allowance related to net operating loss and contribution carryforwards $ 0.1 $ 0.1  
Valuation allowance related to net operating loss carryforwards   $ 0.7  
Net operating loss carryforwards expiration period   5 years  
State | Panther      
Operating loss and contribution carryforwards      
Operating loss carryforwards   $ 5.3  
Foreign      
Operating loss and contribution carryforwards      
Valuation allowance related to net operating loss carryforwards     $ 0.3
Federal | Panther      
Operating loss and contribution carryforwards      
Operating loss carryforwards   $ 1.3  
Net operating loss carryforwards expiration period   13 years  
Minimum | State      
Operating loss and contribution carryforwards      
State net operating loss and contribution carryforwards expiration period   5 years  
Minimum | State | Panther      
Operating loss and contribution carryforwards      
Net operating loss carryforwards expiration period   5 years  
Maximum | State      
Operating loss and contribution carryforwards      
State net operating loss and contribution carryforwards expiration period   20 years  
Maximum | State | Panther      
Operating loss and contribution carryforwards      
Net operating loss carryforwards expiration period   20 years