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, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic loss per common share
Net loss	$ (30,690)	$ (19,192)	$ (14,834)
Net loss allocated to participating securities	123	98	94
Net loss allocated to common shareholders	$ (30,567)	$ (19,094)	$ (14,740)
Basic weighted-average common shares outstanding	40,743	40,032	38,983
Basic loss per common share (in dollars per share)	$ (0.75)	$ (0.48)	$ (0.38)
Diluted loss per common share
Net loss	$ (30,690)	$ (19,192)	$ (14,834)
Net loss allocated to participating securities	123	98	94
Net loss allocated to common shareholders	$ (30,567)	$ (19,094)	$ (14,740)
Diluted (in shares)	40,743	40,032	38,983
Diluted loss per common share (in dollars per share)	$ (0.75)	$ (0.48)	$ (0.38)