Net Income (Loss) Per Share (Schedule Of Net Income Per Basic And Diluted Shares) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011
Net Income (Loss) Per Share [Abstract]
Net income (loss)	$ (6,499)	[1]	$ (447)	[1]	$ 143	[1]	$ 92	[1]	$ 547		$ 1,566		$ 1,398		$ 846		$ (6,711)	$ 4,357
Weighted Average Shares Outstanding, Basic																	6,946	6,906
Per Share Amount, Basic	$ (0.93)	[2]	$ (0.06)	[2]	$ 0.02	[2]	$ 0.01	[2]	$ 0.08	[2]	$ 0.23	[2]	$ 0.20	[2]	$ 0.12	[2]	$ (0.97)	$ 0.63
Weighted Average Shares Outstanding, Dilutive effect of common equivalent shares																		46
Per Share Amount, Dilutive effect of common equivalent shares
Weighted Average Shares Outstanding, Dilutive																	6,946	6,952
Per Share Amount, Dilutive	$ (0.93)	[2]	$ (0.06)	[2]	$ 0.02	[2]	$ 0.01	[2]	$ 0.08	[2]	$ 0.22	[2]	$ 0.20	[2]	$ 0.12	[2]	$ (0.97)	$ 0.63

[1] Includes a $5.7 million non-cash charge in the fourth quarter of 2012 to record a valuation allowance against our deferred tax assets.

[2] The summation of quarterly per share amounts may not equal the calculation for the full year, as each quarterly calculation is performed discretely.