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Fair Value Measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Schedule of assets and liabilities measured at fair value on recurring basis |  |
Interest Rate Derivative Liabilities, at Fair Value Disclosure | $ 20 | $ 69
Fair Value, Inputs, Level 1 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Interest Rate Derivative Liabilities, at Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 2 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Interest Rate Derivative Liabilities, at Fair Value Disclosure | 20 | 69
Fair Value, Inputs, Level 3 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Interest Rate Derivative Liabilities, at Fair Value Disclosure | 0 | 0
Money market mutual funds [Member] |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure | 336 | 7,318
Money market mutual funds [Member] | Fair Value, Inputs, Level 1 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure | 336 | 7,318
Money market mutual funds [Member] | Fair Value, Inputs, Level 2 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure | 0 | 0
Money market mutual funds [Member] | Fair Value, Inputs, Level 3 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure | $ 0 | 0
Certificates of Deposit |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure |  | 1,001
Certificates of Deposit | Fair Value, Inputs, Level 1 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure |  | 1,001
Certificates of Deposit | Fair Value, Inputs, Level 2 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure |  | 0
Certificates of Deposit | Fair Value, Inputs, Level 3 |  |
Schedule of assets and liabilities measured at fair value on recurring basis |  |
Assets, Fair Value Disclosure |  | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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