Organization (Details) - USD ($) |
1 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
May 31, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Aug. 31, 2020 |
Sep. 16, 2019 |
Dec. 31, 2016 |
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| Class of Warrant or Right [Line Items] | ||||||
| Accumulated deficit | $ 199,103,000 | $ 183,278,000 | ||||
| Cash used in operating activities | 8,755,000 | 15,772,000 | ||||
| Cash | $ 12,862,000 | 10,872,000 | ||||
| Reduction on workforce | 35.00% | 35.00% | ||||
| Proceeds from exercise of common stock warrants | $ 3,334,000 | $ 0 | ||||
| Debt covenant, unrestricted cash | 2,000,000 | |||||
| Unrestricted cash | 10,862,000 | |||||
| Sale of shares (in dollars per share) | $ 1.00 | |||||
| Loan agreement | ||||||
| Class of Warrant or Right [Line Items] | ||||||
| Extinguishment of debt amount | 1,512,000 | |||||
| Borrowing capacity | $ 7,000,000 | |||||
| PWB loan agreement | Term loans | ||||||
| Class of Warrant or Right [Line Items] | ||||||
| Borrowing capacity | 2,000,000 | $ 2,000 | ||||
| Direct offering | ||||||
| Class of Warrant or Right [Line Items] | ||||||
| Proceeds from direct offering | $ 7,082,000 | |||||
| X | ||||||||||
- Definition Debt Covenant, Covenant Compliance, Unrestricted Cash No definition available.
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- References No definition available.
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 Gross amount of debt extinguished. No definition available.
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s). No definition available.
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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 amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. No definition available.
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