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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 |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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