Basis Of Presentation And Significant Accounting Policies - Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended																	12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Loss Per Share [Line Items]
Vested restricted stock units used to compute basic net loss per share																	44,522	5,063		221,335
Earnings Per Share, Basic and Diluted [Abstract]
Net loss	$ 772		$ 1,028		$ 823		$ (148)		$ 787		$ 2,512		$ (616)		$ (2,419)			$ 2,475	$ 264	$ (4,924)
Shares used to compute basic net loss per share (in dollars per share)																		18,571,000	18,789,000	19,274,000
Shares used to compute diluted net loss per share (in dollars per share)																		18,878,000	19,159,000	19,274,000
Earnings Per Share, Basic (in dollars per share)	$ 0.04	[1]	$ 0.06	[1]	$ 0.04	[1]	$ (0.01)	[1]	$ 0.04	[1]	$ 0.14	[1]	$ (0.03)	[1]	$ (0.13)	[1]		$ 0.13	$ 0.01	$ (0.26)
Earnings Per Share, Diluted (in dollars per share)	$ 0.04	[1]	$ 0.05	[1]	$ 0.04	[1]	$ (0.01)	[1]	$ 0.04		$ 0.14		$ (0.03)		$ (0.13)			$ 0.13	$ 0.01	$ (0.26)
Stock Options
Earnings Per Share, Basic and Diluted [Abstract]
Stock options																		307,000	359,000	0
Restricted Stock Units (RSUs)
Earnings Per Share, Basic and Diluted [Abstract]
Stock options																		0	11,000	0
Stock Options
Earnings Per Share, Basic and Diluted [Abstract]
Antidilutive common shares excluded from computation of diluted net loss																		66,917	177,891	268,662
Common Stock [Member]
Earnings Per Share, Basic and Diluted [Abstract]
Antidilutive common shares excluded from computation of diluted net loss																				403,670

[1] Earnings per share are computed independently for each of the quarters presented. Therefore, the sum of the quarterly net earnings per share will not necessarily equal the total for the year.