Loss 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, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic loss per common share
Net loss	$ (19,192)	$ (14,834)	$ (16,682)
Net loss allocated to participating securities	98	94	111
Net loss allocated to common shareholders	$ (19,094)	$ (14,740)	$ (16,571)
Basic weighted-average common shares outstanding	40,032	38,983	37,861
Basic loss per common share (in dollars per share)	$ (0.48)	$ (0.38)	$ (0.44)
Diluted loss per common share
Net loss	$ (19,192)	$ (14,834)	$ (16,682)
Net loss allocated to participating securities	98	94	111
Net loss allocated to common shareholders	$ (19,094)	$ (14,740)	$ (16,571)
Basic weighted-average common shares outstanding	40,032	38,983	37,861
Effect of dilutive options and awards (in shares)	0	0	0	[1]
Diluted weighted-average common shares outstanding	40,032	38,983	37,861
Diluted loss per common share (in dollars per share)	$ (0.48)	$ (0.38)	$ (0.44)

[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 per common share. For the years ended December 31, 2022, 2021, and 2020 all stock options and awards were excluded from the calculation of diluted weighted-average common shares outstanding as these would be antidilutive to the net loss.