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RELATED-PARTY TRANSACTIONS - Legion Affiliates (Details) - Greater Than 5% Shareholder, Legion Partners Asset Management, LLC
Mar. 13, 2017
USD ($)
director
Apr. 26, 2018
shares
May 19, 2017
shares
Related Party Transaction [Line Items]      
Ownership percentage     5.60%
Number of additional independent directors | director 2    
Reimbursable expense threshold | $ $ 100,000    
Subsequent Event      
Related Party Transaction [Line Items]      
Ownership percentage   4.80%  
Voting Common Stock      
Related Party Transaction [Line Items]      
Common stock, shares outstanding (in shares)     2,938,679
Company ownership percentage maximum threshold 10.00%    
Voting Common Stock | Subsequent Event      
Related Party Transaction [Line Items]      
Common stock, shares outstanding (in shares)   2,439,751