(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	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic (loss) income per common share
Net (loss) income	$ (134)	$ 1,565	$ 2,401	$ (2,064)
Net loss allocated to participating securities	1	(15)	(17)	20
Net loss allocated to common shareholders	$ (133)	$ 1,550	$ 2,384	$ (2,044)
Basic weighted-average common shares outstanding	37,255	36,526	37,065	36,331
Basic loss per common share	$ 0.00	$ 0.04	$ 0.06	$ (0.06)
Diluted (loss) income per common share
Net (loss) income	$ (134)	$ 1,565	$ 2,401	$ (2,064)
Net loss allocated to participating securities	1	(14)	(16)	20
Net loss allocated to common shareholders	$ (133)	$ 1,551	$ 2,385	$ (2,044)
Basic weighted-average common shares outstanding	37,255	36,526	37,065	36,331
Effect of dilutive stock options and awards		1,084	785
Diluted weighted-average common shares outstanding	37,255	37,610	37,850	36,331
Diluted loss per common share	$ 0.00	$ 0.04	$ 0.06	$ (0.06)