Per Common Share Amounts - Income (Loss) 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
Numerators:
Net income (loss)	$ (6,109)	$ (8,180)	$ 6,678
Income attributable to unvested participating securities	(427)	0	0
Net income (loss) used in calculating earnings per share	$ (6,536)	$ (8,180)	$ 6,678
Denominators:
Weighted average common shares for basic earnings per share (in shares)	48,278	48,195	48,124
Weighted average common shares outstanding, diluted (in shares)	48,278	48,195	48,124
Net income (loss) per common share - basic (in dollars per share)	$ (0.14)	$ (0.17)	$ 0.14
Net income (loss) per common share - diluted (in dollars per share)	$ (0.14)	$ (0.17)	$ 0.14
Antidilutive securities (in shares)		34	14