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RELATED-PARTY TRANSACTIONS - Legion Affiliates (Details) |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 13, 2017 USD ($) director | Jun. 30, 2018 | Apr. 26, 2018 shares | May 19, 2017 shares
Greater Than 5% Shareholder, Legion Partners Asset Management, LLC |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Ownership percentage |  |  | 4.80% | 5.60%
Number of additional independent directors | director | 2 |  |  |
Reimbursable expense threshold | $ | $ 100,000 |  |  |
Greater Than 5% Shareholder, Legion Partners Asset Management, LLC | Voting Common Stock |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Common stock, shares outstanding (in shares) | shares |  |  | 2,439,751 | 2,938,679
Company ownership percentage maximum threshold | 10.00% |  |  |
Director | Bonnie G. Hill |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Service term |  | 1 year |  |

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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References 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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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