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SHARE-BASED COMPENSATION - Summary of Share-Based Compensation Expense (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
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.