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Stockholders' Equity And Stock-Based Compensation Expense (Common Stock Outstanding And Stockholders' Equity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Common Stock, Beginning balance	40,016,792
Common Stock, Ending balance	40,031,280
Stockholders' equity, Stock-based compensation for:	$ 495	$ 250
Stockholders' equity, Proceeds from registered direct offering of common stock		189,825
Net loss	$ (17,527)	$ (3,526)
Stock Option [Member]
Common Stock, Exercise of stock options	19,609

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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