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SHARE-BASED COMPENSATION - Summary of Share-Based Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Summary of share-based compensation expense |  |  |
Benefit for income taxes |  | $ (205) | $ (5,045)
Net effect of share-based compensation expense on net loss | [1] | $ 803 | $ 813
Basic earnings per share |  | $ 0.05 | $ 0.05
Diluted earnings per share |  | $ 0.05 | $ 0.05
Pre-tax compensation expense for all unvested share-based awards |  | $ 1,132 |
Cost of sales |  |  |
Summary of share-based compensation expense |  |  |
Share-based compensation expense |  | 99 | $ 101
Selling, general and administrative |  |  |
Summary of share-based compensation expense |  |  |
Share-based compensation expense |  | $ 704 | $ 712
[1] | Income tax benefit is not illustrated because the Company is currently in a full tax valuation allowance position and an actual income tax benefit was not realized for the years ended December 31, 2018 and 2017. The result of the income (loss) situation creates a timing difference, resulting in a deferred tax asset, which is fully reserved for in the Company’s valuation allowance.

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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