Organization and Description of Business Operations (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |
1 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Retained Earnings (Accumulated Deficit) | $ (95,397) | $ (59,030) | |
| Payments of Stock Issuance Costs | $ 2,184 | $ 0 | |
| National Securities Corporation [Member] | |||
| Payments of Stock Issuance Costs | $ 1,800 | ||
| Underwritten Public Offering [Member] | |||
| Stock Issued During Period, Shares, New Issues | 5,290,000 | ||
| Shares Issued, Price Per Share | $ 4.35 | ||
| Stock Issued During Period, Value, New Issues | $ 23,000 | ||
| Proceeds from Issuance Underwritten Public Offering | 20,800 | ||
| Payments of Stock Issuance Costs | $ 2,200 | ||
| Common Stock [Member] | |||
| Shares Issued, Price Per Share | $ 4.33 | ||
| Stock Issued During Period Shares Common Shares For At The Market Offering | 1,841,774 | ||
| Stock Issued During Period Value Common Shares For At The Market Offering Gross | $ 8,000 | ||
| Stock Issued During Period Value Common Shares For At The Market Offering Net | $ 7,700 | ||
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- Definition The cash inflow associated with the amount received from entity's underwritten offering of stock to the public. No definition available.
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- Definition Total number of shares issued during the period for at the market offering. No definition available.
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- Definition Aggregate gross value of common shares issued during the period for at the market offering. No definition available.
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- Definition Aggregate value of common shares issued during the period for at the market offering. No definition available.
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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Per share or per unit amount of equity securities issued. No definition available.
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- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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