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NET INCOME (LOSS) PER SHARE - Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income (loss)	$ (3,913)	$ 4,820	$ 6,981
Denominator:
Weighted average shares outstanding-Basic	35,556	35,642	35,467
Potentially dilutive ordinary share equivalents-stock options and restricted stock		677	709
Weighted average shares outstanding-Diluted	35,556	36,319	36,176
Net income (loss) per share Basic	$ (0.11)	$ 0.14	$ 0.20
Net income (loss) per share Diluted	$ (0.11)	$ 0.13	$ 0.19

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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