(Loss) Income Per Common Share (Computation Of Basic And Diluted (Loss) Income Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic (loss) income per common share
Net (loss) income		$ (14,834)	$ (16,682)	$ 1,720
Net (loss) income allocated to participating securities		94	111	(12)
Net (loss) income allocated to common shareholders		$ (14,740)	$ (16,571)	$ 1,708
Basic weighted-average common shares outstanding		38,983	37,861	37,118
Basic (loss) income per common share		$ (0.38)	$ (0.44)	$ 0.05
Diluted (loss) income per common share
Net (loss) income		$ (14,834)	$ (16,682)	$ 1,720
Net (loss) income allocated to participating securities		94	111	(12)
Net (loss) income allocated to common shareholders		$ (14,740)	$ (16,571)	$ 1,708
Basic weighted-average common shares outstanding		38,983	37,861	37,118
Effect of dilutive options and awards	[1]			742
Diluted weighted-average common shares outstanding		38,983	37,861	37,860
Diluted (loss) income per common share		$ (0.38)	$ (0.44)	$ 0.05

[1] We excluded stock options from the calculation of diluted weighted-average common shares outstanding if the per share value, including the sum of (i) the exercise price of the options and (ii) the amount of the compensation cost attributed to future services and not yet recognized, was greater than the average market price of the shares, because the inclusion of these stock options would be antidilutive to (loss) income per common share. For the year ended December 31, 2021 and 2020 all stock options and awards were excluded from the calculation of weighted-average common shares outstanding as these would be antidilutive to the net loss. For the year ended December 31, 2019 stock options to purchase 131,000 shares were excluded from the calculation of diluted weighted-average common shares outstanding.