Shareholders' Equity And Stock-Based Compensation (Narrative) (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended							3 Months Ended			9 Months Ended
	Jul. 23, 2008	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 2006 Equity Incentive Plan [Member]	May 01, 2012 2006 Equity Incentive Plan [Member]	Dec. 31, 2010 2006 Equity Incentive Plan [Member]	Sep. 30, 2012 2001 Stock Option Plan And Non-Employee Directors' Stock Option Plan [Member]	Sep. 30, 2012 Employee Stock Purchase Plan [Member]	Sep. 30, 2011 Employee Stock Purchase Plan [Member]	Apr. 27, 2011 Employee Stock Purchase Plan [Member]	Sep. 30, 2012 Employee Stock Purchase Plan [Member]	Sep. 30, 2011 Employee Stock Purchase Plan [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Aggregate number of shares of common stock which awards could be granted		359		359		239	699			267
Authorized additional number of shares of common stock reserved and issuable								300	250
Vesting period of options under equity incentive plan				3 years
Term of options				10 years
Shares issued in lieu of cash for director fees under director program			1	1	1
Maximum amount of common stock participants may elect to purchase	$ 100,000
Window period		20 days		20 days
Weighted average fair value of options granted				$ 3.84	$ 2.57
Expected forfeiture rate of stock options				5.00%
Weighted average remaining contractual life of options exercisable, years				5 years 2 months 27 days
Stock option expense		113,000	68,000	308,000	150,000
Unrecognized compensation costs on non-vested awards		$ 791,000		$ 791,000
Unrecognized compensation costs, period of recognition, years				2 years 1 month 13 days
Maximum number of shares approved under purchase plan											100			100
Increase in maximum number of shares approved													100
Shares purchased for award											5	6		13	14