Organization and Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Feb. 25, 2021 |
Feb. 06, 2020 |
Oct. 02, 2018 |
Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Net loss | $ (2,633) | $ 1,169 | |||||
| Net cash used in operating activities | (2,992) | $ (3,398) | |||||
| Accumulated deficit | (243,740) | $ (241,107) | |||||
| Proceeds from issuance of public offering | $ 9,400 | ||||||
| Underwriting discounts and commissions and offering expenses payable | $ 1,200 | ||||||
| Non interest note receivable | $ 6,000 | ||||||
| Debt description | The 36-month term of the note receivable requires 18 payments of $138,889 followed by 18 payments of $194,444, with maturing of the note receivable to occur October 1, 2021. | ||||||
| Proceeds from notes receivable | $ 1,400 | ||||||
| Four Registered Direct Offerings [Member] | |||||||
| Number of shares issuance cost | 11,015,000 | ||||||
| Proceeds from issuance cost | $ 20,900 | ||||||
| Stock offering expense | $ 1,600 | ||||||
| ATM Equity Distribution Agreement [Member] | |||||||
| Stock offering expense | $ 100 | ||||||
| Number of stock sold during period | 354,381 | ||||||
| Sale of stock value | $ 800 | ||||||
| ATM Equity Distribution Agreement [Member] | Maximum [Member] | |||||||
| Proceeds from issuance of public offering | $ 2,500 | ||||||
| Equity Distribution Agreement [Member] | Maxim Group LLC [Member] | |||||||
| Aggregate offering price | $ 15,000 | ||||||
| Sale of stock, description | The Offering will terminate upon the earlier of (i) the sale of shares having an aggregate offering price of $15.0 million, (ii) the termination by either Maxim or the Company upon the provision of fifteen (15) days written notice, or (iii) February 25, 2022. Under the terms of the 2021 Distribution Agreement, Maxim will be entitled to a transaction fee at a fixed rate of 2.0% of the gross sales price of Shares sold under the 2021 Distribution Agreement. | ||||||
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- Definition Number of shares issuance cost. No definition available.
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- Definition Underwriting discounts and commissions and offering expenses payable. No definition available.
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- Definition Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after allowance for credit loss, of accounts and financing receivables, classified as noncurrent. Includes, but is not limited to, notes and loan receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. 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 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 Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor. No definition available.
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- Definition Description of stock transaction which may include details of the offering (IPO, private placement), a description of the stock sold, percentage of subsidiary's or equity investee's stock sold, a description of the investors and whether the stock was issued in a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. No definition available.
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