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Stock-Based Compensation (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Stock options fair market value | 100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent |
Options expiration from date of grant | 10 years |
Options expiration from date of death | 1 year |
Exercised, Number of Shares | 0 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 0 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Stock Granted, Value, Share-based Compensation, Gross | $ 35 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross | $ 367 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross
Unrecognized Share Based Compensation | 172 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions |
Number of Years To Recognize Remaining Expense | 4 years |
Recognized compensation expense | $ 67 us-gaap_AllocatedShareBasedCompensationExpense | $ 162 us-gaap_AllocatedShareBasedCompensationExpense
Chief Executive Officer [Member] |  |
Granted, Number of Shares |  | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember
Employee [Member] |  |
Number Of Employees That Forfeited Options To Purchase Common Shares | 4 else_NumberOfEmployeesThatForfeitedOptionsToPurchaseCommonShares / us-gaap_TitleOfIndividualAxis = else_EmployeeMember |
Canceled/forfeited/expired, Number of Shares | 11,980 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod / us-gaap_TitleOfIndividualAxis = else_EmployeeMember |
Director [Member] |  |
Number of individuals receiving grants |  | 3 else_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfIndividualsReceivingGrants / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
Stock Option Vesting Period |  | 4 years
Vesting Percentage |  | 20%
Share Based Compensation Arrangement By Share Based Payment Award Options Granted To Each Director |  | 50,000 else_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedToEachDirector / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
Other Outside Director [Member] |  |
Granted, Number of Shares | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_TitleOfIndividualAxis = else_OtherOutsideDirectorMember | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_TitleOfIndividualAxis = else_OtherOutsideDirectorMember
Number of individuals receiving grants | 1 else_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfIndividualsReceivingGrants / us-gaap_TitleOfIndividualAxis = else_OtherOutsideDirectorMember | 1 else_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfIndividualsReceivingGrants / us-gaap_TitleOfIndividualAxis = else_OtherOutsideDirectorMember
Stock Option Vesting Period | 4 years | 4 years
Vesting Percentage | 20% | 20%
Former Director [Member] |  |
Number of outside directors that forfeited options to purchase common shares | 1 else_NumberOfOutsideDirectorsThatForfeitedOptionsToPurchaseCommonShares / us-gaap_TitleOfIndividualAxis = else_FormerDirectorMember |
Canceled/forfeited/expired, Number of Shares | 2,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod / us-gaap_TitleOfIndividualAxis = else_FormerDirectorMember |
2013 Equity Incentive Plan [Member] |  |
Number of shares vested | 125,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares / us-gaap_PlanNameAxis = else_TwoThousandThirteenEquityIncentivePlanMember |
Maximum amount of options authorized | 300,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = else_TwoThousandThirteenEquityIncentivePlanMember |
Number of shares available for purchase | 250,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = else_TwoThousandThirteenEquityIncentivePlanMember |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = else_TwoThousandThirteenEquityIncentivePlanMember |
1997 Stock Option Plan [Member] |  |
Number of shares vested | 7,500 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySevenStockOptionPlanMember |
Maximum amount of options authorized | 450,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySevenStockOptionPlanMember |
Number of shares available for purchase | 7,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySevenStockOptionPlanMember |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySevenStockOptionPlanMember |
1996 Stock Purchase Plan [Member] |  |
Stock options fair market value | 85.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySixStockPurchasePlanMember |
Maximum amount of options authorized | 150,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySixStockPurchasePlanMember |
Maximum percentage of earning employees canuse to purchase company common stock | 10.00%else_EmployeeStockPurchasePlanMaximumPercentOfEarningsAllowedToPurchaseCompanyStock / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySixStockPurchasePlanMember |
Total Shares Issued Through Employee Stock Purchase Plans Since Inception | 81,653 else_TotalSharesIssuedThroughEmployeeStockPurchasePlansSinceInception / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySixStockPurchasePlanMember |
Shares issued under the ESPP | 814 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySixStockPurchasePlanMember | 2,795 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_PlanNameAxis = else_OneThousandNineHundredNinetySixStockPurchasePlanMember

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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 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: 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 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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