Stockholders' Equity - Equity Incentive Plan (Details) - Two Thousand Fifteen Incentive Plan [Member]  | 
3 Months Ended | 
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 Mar. 31, 2020  
shares 
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 2,000,000 | 
| Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years | 
| Options | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award | 10 years | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Number of shares authorized for issuance under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Description of terms of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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- Details 
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