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RELATED-PARTY TRANSACTIONS - Legion Affiliates (Details) - Greater Than 5% Shareholder, Legion Partners Asset Management, LLC - USD ($)
Mar. 13, 2017
May 19, 2017
Related Party Transaction [Line Items]    
Ownership percentage   5.60%
Reimbursable expense threshold $ 100,000  
Voting Common Stock    
Related Party Transaction [Line Items]    
Common stock, shares outstanding (in shares)   2,938,679
Company ownership percentage maximum threshold 10.00%