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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Numerator: |  |  |  |
Net loss | $ (4,690) | $ (4,295) | $ (6,641) | $ (9,903)
Denominator: |  |  |  |
Weighted average shares outstanding - basic and diluted (in shares) | 34,186 | 33,384 | 34,181 | 33,363
Earnings (loss) per share: |  |  |  |
Basic and diluted (in dollars per share) | $ (0.14) | $ (0.13) | $ (0.19) | $ (0.30)
Options |  |  |  |
Anti-dilutive instruments excluded from diluted loss per common share: |  |  |  |
Options (in shares) | 4,986 | 1,882 | 4,986 | 1,882

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