Accounting For Stock-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity based compensation expense	$ 449,000	$ 430,000
Unrecognized compensation cost related to non-vested equity based compensation	946,000
Unrecognized equity based compensation weighted average period, years	2 years 4 months 28 days
Fair value of shares vested	178,000	215,000
Shares, Granted	36,528
Weighted Average Grant Date Fair Value, Granted	$ 7.37
Stock Options And Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity based compensation expense	354,000	302,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for stock based benefits	1,041,745
Vesting period, years	4 years
Increase in authorized shares	350,000
Number of shares available for future issuance	453,037
Weighted average remaining contractual term, years	4 years 3 months 4 days
Aggregate intrinsic value for all options outstanding	330,000
Weighted average remaining contractual term for exercisable options, years	2 years 10 months 28 days
Aggregate intrinsic value of exercisable options	290,000
Aggregate intrinsic value of exercised stock options	10,000	13,000
Proceeds from exercise of stock options	27,000
Stock Options [Member] | Contractual Term Seven Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration of stock options from date of grant, years	7 years
Stock Options [Member] | Contractual Term Ten Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration of stock options from date of grant, years	10 years
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity based compensation expense	54,000	87,000
Number of shares available for future issuance	166,582
Maximum contribution per plan year	6,500
Employees can purchase stock at the percentage rate of the lower of the market price on the first or last day of the offering period	85.00%
Share issuances for compensation purposes, shares	19,759	25,003
Employee Stock Purchase Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payroll deduction for employee stock purchase plan percentage	1.00%
Employee Stock Purchase Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payroll deduction for employee stock purchase plan percentage	10.00%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares vested	69,000	85,000
Vesting period, years	4 years
Aggregate intrinsic value for all options outstanding	331,000
Restricted stock units to common stock ratio, shares entitled	1
Stock Grant Plan For Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity based compensation expense	$ 41,000	$ 41,000
Weighted average grant date fair value	$ 8.17	$ 10.12
Shares of common stock reserved for stock based benefits	30,000
Number of shares available for future issuance	11,000
Number of shares granted for non-employee directors upon re-election	1,000
Plan expiration date	May 19, 2018
Share issuances for compensation purposes, shares	5,000	4,000