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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Summary of Significant Accounting Policies [Abstract] |
Activity under August 2013 Contract Settlement | Activity under the August 2013 Contract Settlement was as follows:
|  | 2018 |  |  | 2017 |  |  | 2016 |
Deferred Revenue, beginning of year |  | $ | 2,500 |  |  | $ | 4,000 |  |  | $ | 3,000 |
ASC 606 Adjustment |  |  | (2,500 | ) |  |  | — |  |  |  | — |
Payment received |  |  | — |  |  |  | — |  |  |  | 2,500 |
Less: Amount amortized as revenue |  |  | — |  |  |  | 1,500 |  |  |  | 1,500 |
Deferred Revenue, end of year |  | $ | — |  |  | $ | 2,500 |  |  | $ | 4,000 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045 + Details
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