Equity And Stock-Based Compensation (Narrative) (Details) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended
	Apr. 30, 2016	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	May 16, 2014	May 14, 2004
Equity And Stock-Based Compensation [Line Items]
Restricted vesting period					5 years
Stock Option [Member]
Equity And Stock-Based Compensation [Line Items]
Grant date fair value of options vesting			$ 91,000	$ 76,000	$ 190,000	$ 133,000
Unrecognized estimated compensation cost related to non-vested stock options granted			$ 781,000		$ 781,000
Recognition period of unrecognized compensation cost					1 year 11 months 27 days
Options exercised			0		0
Intrinsic unrealized value of all options outstanding, vested and expected to vest			$ 2,000,000		$ 2,000,000
Percentage of option currently exercisable					71.50%
Restricted Stock Units (RSUs) [Member]
Equity And Stock-Based Compensation [Line Items]
Compensation expense			129,000		$ 160,000
Unrecognized estimated compensation cost related to non-vested stock options granted			$ 655,000		$ 655,000
Common Stock shares remaining for future issuances			68,153		68,153
Restricted Stock Units (RSUs) [Member] | Employee/Director [Member]
Equity And Stock-Based Compensation [Line Items]
Options granted	5,625	62,528
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member]
Equity And Stock-Based Compensation [Line Items]
Vesting period of stock options and RSU					4 years
Percentage of shares vested					25.00%
Restricted Stock Units (RSUs) [Member] | Director [Member]
Equity And Stock-Based Compensation [Line Items]
Vesting period of stock options and RSU					1 year
Percentage of shares vested					100.00%
May 2014 Stock Repurchase Plan [Member]
Equity And Stock-Based Compensation [Line Items]
Repurchase program, amount authorized							$ 10,000,000
Repurchase program, shares authorized								350,000
Repurchased program, amount repurchased					$ 7,200,000
Repurchase program, remaining amount authorized			$ 2,800,000		$ 2,800,000
Share price					$ 12.92
Class A Nonvoting Common Stock [Member]
Equity And Stock-Based Compensation [Line Items]
Common Stock authorized for issuance under 2010 Stock Incentive Plan			1,250,000		1,250,000
Common Stock shares remaining for future issuances			551,800		551,800
Minimum [Member]
Equity And Stock-Based Compensation [Line Items]
Vesting period of stock options and RSU					0 years
Maximum [Member]
Equity And Stock-Based Compensation [Line Items]
Vesting period of stock options and RSU					4 years