Accounting For Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity based compensation expense	$ 103,000	$ 105,000
Unrecognized compensation cost related to non-vested equity based compensation	878,000
Unrecognized equity based compensation weighted average period, years	2 years 1 month 24 days
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity based compensation expense	66,000	64,000
Shares of common stock reserved for stock based benefits	1,044,307
Vesting period, years	4 years
Number of shares available for future issuance	462,287
Weighted average remaining contractual term, years	4 years 7 days
Aggregate intrinsic value for all options outstanding	143,815
Weighted average remaining contractual term for exercisable options, years	2 years 11 months 5 days
Aggregate intrinsic value of exercisable options	132,090
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	12,000	15,000
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%
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]
Equity based compensation expense	25,000	26,000
Vesting period, years	4 years
Aggregate intrinsic value for all options outstanding	$ 240,000
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]
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