Fair Value Measurements (Narrative) (Details) - USD ($) |
3 Months Ended | 6 Months Ended |
|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2018 |
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| Fair Value Measurements [Abstract] | ||
| Goodwill impairment loss | $ 1,463,000 | $ 1,463,000 |
| Transfers between levels | $ 0 |
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- Definition Amount of transfer of financial instrument between levels of the fair value hierarchy. No definition available.
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- References No definition available.
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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