Common Stock And Stock Options (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended						12 Months Ended				9 Months Ended	12 Months Ended	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 2006 Equity Incentive Plan [Member]	Dec. 31, 2010 2006 Equity Incentive Plan [Member]	Dec. 31, 2012 2001 Stock Option Plan And Non-Employee Directors' Stock Option Plan [Member]	Dec. 31, 2012 Employee Stock Purchase Plan [Member]	Dec. 31, 2011 Employee Stock Purchase Plan [Member]	Dec. 31, 2010 Employee Stock Purchase Plan [Member]	Dec. 31, 2012 Minimum [Member]	Sep. 30, 2012 Minimum [Member] 2006 Equity Incentive Plan [Member]	Dec. 31, 2012 Maximum [Member]	Sep. 30, 2012 Maximum [Member] 2006 Equity Incentive 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	239		699		267
Increase in maximum number of shares approved				300	250			100
Vesting period of options under equity incentive plan										1 year	3 years	3 years	10 years
Shares issued in lieu of cash for director fees under director program	1	3	3
Maximum amount of common stock participants may elect to purchase	$ 100
Window period	20 days
Weighted average remaining contractual life of options exercisable, years	4 years 5 months 16 days
Weighted average remaining contractual life of options outstanding, years	5 years 6 months 15 days
Total intrinsic value of options exercised	84	163	55
Weighted average fair value of options granted	$ 3.84	$ 2.57	$ 1.86
Stock option expense	414	214	474
Unrecognized compensation costs on non-vested awards	$ 685
Unrecognized compensation costs. period of recognition, years	1 year 8 months 1 day
Maximum number of shares approved under purchase plan							100
Shares purchased for award							20	17	15