Organization and Summary of Significant Accounting Policies - Additional information (Details) $ / shares in Units, $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||
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Jan. 31, 2020
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Jan. 31, 2019
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Sep. 30, 2020
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Dec. 31, 2019
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Jan. 01, 2019 |
Dec. 31, 2018
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| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||||
| Number of Operating Segments | segment | 1 | |||||
| Stockholders' Equity Note, Stock Split, Conversion Ratio | 0.1667 | |||||
| Common Stock, Par or Stated Value Per Share | $ / shares | $ 0.001 | $ 0.001 | $ 0.001 | |||
| Substantial Doubt about Going Concern, Management's Evaluation | We assess going concern uncertainty in our financial statements to determine if we have sufficient cash on hand and working capital, including available borrowings on loans, to operate for a period of at least one year from the date the financial statements are issued or available to be issued, which is referred to as the "look-forward period" as defined by Accounting Standard Update ASU No. 2014-15. As part of this assessment, based on conditions that are known and reasonably knowable to us, we will consider various scenarios, forecasts, projections, estimates and will make certain key assumptions, including the timing and nature of projected cash expenditures or programs, and its ability to delay or curtail expenditures or programs, if necessary, among other factors. Based on this assessment, as necessary or applicable, we make certain assumptions around implementing curtailments or delays in the nature and timing of programs and expenditures to the extent we deem probable those implementations can be achieved and we have the proper authority to execute them within the look-forward period in accordance with ASU No. 2014-15.Based upon the above assessment, we concluded that, at the date of filing the financial statements in this Annual Report on Form 10-K for the year ended December 31, 2019, we did not have sufficient cash to fund our operations for the next 12 months without additional funds and, therefore, there was substantial doubt about our ability to continue as a going concern within 12 months after the date the financial statements were issued. | |||||
| Money Market Funds, at Carrying Value | $ 4,900 | $ 8,900 | ||||
| Cash and Cash Equivalents, at Carrying Value | 5,223 | 9,295 | ||||
| Subsequent Event | ||||||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||||
| Net cash proceeds from common stock and exercises of warrants | $ 1,900 | $ 8,000 | ||||
| Accounting Standards Update 2016-02 [Member] | ||||||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||||
| Lessee, Operating Lease, Discount Rate | 12.00% | |||||
| Fair Value, Recurring [Member] | Money Market Funds [Member] | ||||||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||||
| Cash Equivalents, at Carrying Value | $ 4,900 | $ 8,900 | ||||
| Minimum [Member] | ||||||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||||
| Property, Plant and Equipment, Estimated Useful Lives | P3Y | |||||
| Maximum [Member] | ||||||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||||
| Property, Plant and Equipment, Estimated Useful Lives | P5Y | |||||