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RELATED-PARTY TRANSACTIONS - Legion Affiliates (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 13, 2017	Mar. 31, 2019	Apr. 26, 2018	May 19, 2017
Greater Than 5% Shareholder, Legion Partners Asset Management, LLC
Related Party Transaction [Line Items]
Ownership percentage			4.80%	5.60%
Reimbursable expense threshold	$ 100
Greater Than 5% Shareholder, Legion Partners Asset Management, LLC | Voting Common Stock
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)			2,439,751	2,938,679
Director | Bonnie G. Hill
Related Party Transaction [Line Items]
Service term		1 year

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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