Fair Value Measurements (Narrative) (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jun. 30, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Fair Value Measurements [Abstract] | |||
| Goodwill impairment loss | $ 1,463,000 | ||
| Transfers between levels | $ 0 | $ 0 | |
| X | ||||||||||
- Definition Amount of transfer of financial instrument between levels of the fair value hierarchy. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- 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://fasb.org/us-gaap/role/ref/legacyRef
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