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Significant Accounting Policies (Numerators And Denominators In The Calculation Of Basic And Diluted Net Loss Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net loss	$ (17,527)	$ (3,526)
Shares used in computing net loss per share, basic and diluted	39,962	37,721
Net Loss Per Share Basic And Diluted	$ (0.44)	$ (0.09)
Stock Option [Member]
Numerator:
Common stock excluded from net loss per share, diluted	2,086	2,121

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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