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Debt (Schedule of carrying value of Notes and Warrants) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Liability component: |  |  |
Principal |  | $ 1,245 |
Equity component: |  |  |
Warrants | [1] | 318 | $ 318
Conversion feature | [1] | 122 | 122
Net carrying amount | [1] | 440 | 440
Secured convertible notes |  |  |
Liability component: |  |  |
Principal |  | 1,245 | 1,920
Less: debt discount and issuance costs, net of amortization |  | (41) | (188)
Net carrying amount |  | 1,204 | 1,732
Equity component: |  |  |
Current portion of liability component included under short-term debt |  | 1,245 | 1,920
Liability component total |  | $ 1,245 | $ 1,920
[1] | Recorded on the condensed consolidated balance sheets as additional paid-in capital.

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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