Equity And Stock-Based Compensation (Narrative) (Details) - USD ($)	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2016	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Aug. 03, 2016	Dec. 31, 2014	May 16, 2014	May 14, 2004
Stock Option [Member]
Equity And Stock-Based Compensation [Line Items]
Grant date fair value of options vesting			$ 74,000	$ 75,000	$ 264,000	$ 209,000
Unrecognized estimated compensation cost related to non-vested stock options granted			$ 661,000		$ 661,000
Recognition period of unrecognized compensation cost					1 year 11 months 9 days
Options exercised			0		0
Intrinsic unrealized value of all options outstanding, vested and expected to vest			$ 2,100,000		$ 2,100,000
Percentage of option currently exercisable					75.80%
Restricted Stock Units (RSUs) [Member]
Equity And Stock-Based Compensation [Line Items]
Compensation expense			130,000		$ 290,000
Unrecognized estimated compensation cost related to non-vested stock options granted			$ 526,000		$ 526,000
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
James Cotter Jr. [Member]
Equity And Stock-Based Compensation [Line Items]
Options outstanding								582,000
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
Class A [Member]
Equity And Stock-Based Compensation [Line Items]
Options exercised							185,000
Options granted					169,000		112,000
Stock options terminated					74,000		8,000
Options outstanding			582,000		582,000		487,000		568,000
Class A [Member] | James Cotter Jr. [Member]
Equity And Stock-Based Compensation [Line Items]
Stock options terminated					50,000
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