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(Loss) Earnings Per Share (Basic and Diluted Net Loss per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net loss	$ (6,133)	$ (3,227)	$ (32,508)	$ (10,707)
Accretion of preferred stock to redemption value		(217)		(217)
Net loss attributable to common stockholders	$ (6,133)	$ (3,444)	$ (32,508)	$ (10,924)
Denominator:
Weighted average common shares outstanding - basic	20,126,672	360,356	6,975,386	396,071
Net loss per share attributable to common stockholders - basic	$ (0.30)	$ (9.56)	$ (4.66)	$ (27.58)

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- Definition

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or 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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