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Discontinued Operations (Narrative) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Discontinued Operations [Abstract] |  |
Purchase price earn-out percent based on segment contracts | 3.00% |
Period of purchase price earn out payments (in years) | 5 years |
Disposal group purchase price earn out as percent of segment contracts with continued occupancy of building | 4.00% |
Amount due from ADI due to sale | $ 0 | $ 3,000
Other income under the earn out agreement | $ 13,000 | $ 3,000

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- Definition Disposal Group Purchase Price Earn Out As A Percent Of Segment Contracts + References No definition available. + Details
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Namespace Prefix: | else_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Disposal Group Purchase Price Earn Out As Percent Of Segment Contracts With Continued Occupancy Of Building + References No definition available. + Details
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Namespace Prefix: | else_
Data Type: | num:percentItemType
Balance Type: | na
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- Definition Earn Out Receivable + References No definition available. + Details
Name: | else_EarnOutReceivable
Namespace Prefix: | else_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Other Income Earn Out Agreement + References No definition available. + Details
Name: | else_OtherIncomeEarnOutAgreement
Namespace Prefix: | else_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Period Of Purchase Price Earn Out Payments + References No definition available. + Details
Name: | else_PeriodOfPurchasePriceEarnOutPayments
Namespace Prefix: | else_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration