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Net Loss per Share - Calculation of Basic and Diluted Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net loss	$ (6,149)	$ (7,475)
Denominator:
Weighted-average shares, basic (in shares)	40,048	37,846
Weighted-average shares, diluted (in shares)	40,048	37,846
Net loss per share:
Basic (in dollars per share)	$ (0.15)	$ (0.20)
Diluted (in dollars per share)	$ (0.15)	$ (0.20)

X

- 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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