Goodwill - Changes in Goodwill (Details) - USD ($)  | 
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2020  | 
Sep. 30, 2019  | 
Sep. 30, 2020  | 
Sep. 30, 2019  | 
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| Goodwill [Roll Forward] | ||||
| Goodwill, beginning balance | $ 189,000 | |||
| Loss on impairment of goodwill | $ (189,000) | $ 0 | (189,000) | $ 0 | 
| Goodwill, ending balance | $ 0 | $ 0 | ||
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- Definition Amount after accumulated impairment loss of an asset representing 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/disclosureRef 
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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://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available. 
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