Equity Incentive Plan - Summary of Stock Option Activity and Related Information (Details) - 2013 Equity Incentive Plan [Member] - $ / shares |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2020 |
Dec. 31, 2019 |
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| Stock Options | ||
| Outstanding at December 31, 2019 (in shares) | 169,980 | |
| Granted (in shares) | 112,791 | |
| Expired (In shares) | (2,989) | |
| Outstanding at June 30, 2020 (in shares) | 279,782 | 169,980 |
| Exercisable at June 30, 2020 (in shares) | 214,638 | |
| Weighted Average Exercise Price | ||
| Outstanding at December 31, 2019 (in dollars per share) | $ 8.13 | |
| Granted (In dollars per share) | 2.18 | |
| Expired (In dolloar per share) | 62.76 | |
| Outstanding at June 30, 2020 (in dollars per share) | 5.15 | $ 8.13 |
| Exercisable at June 30, 2020 (in dollars per share) | $ 5.91 | |
| Weighted Average Remaining Life (in years) | ||
| Outstanding (in years) | 8 years 9 months 18 days | 9 years 1 month 6 days |
| Exercisable at June 30, 2020 | 8 years 7 months 6 days | |
| Board members | ||
| Stock Options | ||
| Granted (in shares) | 52,791 |
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Life [Roll Forward] No definition available.
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. No definition available.
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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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- Definition Weighted average remaining contractual term for option awards outstanding, 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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