v3.23.2

Note 2 - Investments and Fair Value Measurement (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Cash, Cash Equivalents and Investments [Table Text Block] |
|  | As of December 31, 2022 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Cash, cash equivalents and restricted cash: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 13,275 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,275 |
Money market funds |  |  | 321 |  |  |  | — |  |  |  | — |  |  |  | 321 |
U.S. government agency securities |  |  | 2,444 |  |  |  | — |  |  |  | — |  |  |  | 2,444 |
Commercial paper |  |  | 4,235 |  |  |  | — |  |  |  | — |  |  |  | 4,235 |
Total cash, cash equivalents and restricted cash |  |  | 20,275 |  |  |  | — |  |  |  | — |  |  |  | 20,275 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  | 495 |  |  |  | — |  |  |  | — |  |  |  | 495 |
Total short-term investments |  |  | 495 |  |  |  | — |  |  |  | — |  |  |  | 495 |
Total cash, cash equivalents, restricted cash and short-term investments |  | $ | 20,770 |  |  | $ | — |  |  | $ | — |  |  | $ | 20,770 |
|  | As of December 31, 2021 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Cash, cash equivalents and restricted cash: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 1,443 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,443 |
Money market funds |  |  | 2,822 |  |  |  | — |  |  |  | — |  |  |  | 2,822 |
Commercial paper |  |  | 8,398 |  |  |  | — |  |  |  | — |  |  |  | 8,398 |
Total cash, cash equivalents and restricted cash |  |  | 12,663 |  |  |  | — |  |  |  | — |  |  |  | 12,663 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  | 29,504 |  |  |  | — |  |  |  | — |  |  |  | 29,504 |
Corporate debt securities |  |  | 9,463 |  |  |  | — |  |  |  | — |  |  |  | 9,463 |
Total short-term investments |  |  | 38,967 |  |  |  | — |  |  |  | — |  |  |  | 38,967 |
Total cash, cash equivalents, restricted cash and short-term investments |  | $ | 51,630 |  |  | $ | — |  |  | $ | — |  |  | $ | 51,630 |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
|  | As of December 31, 2022 |
|  | Fair Value |  |  | Level I |  |  | Level II |  |  | Level III |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 321 |  |  | $ | 321 |  |  | $ | — |  |  | $ | — |
U.S. government agency securities |  |  | 2,444 |  |  |  | — |  |  |  | 2,444 |  |  |  | — |
Commercial paper |  |  | 4,730 |  |  |  | — |  |  |  | 4,730 |  |  |  | — |
Total assets measured at fair value |  | $ | 7,495 |  |  | $ | 321 |  |  | $ | 7,174 |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant liability |  |  | 7,098 |  |  |  | — |  |  |  | — |  |  |  | 7,098 |
Total liabilities measured at fair value |  | $ | 7,098 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,098 |
|  | As of December 31, 2021 |
|  | Fair Value |  |  | Level I |  |  | Level II |  |  | Level III |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 2,822 |  |  | $ | 2,822 |  |  | $ | — |  |  | $ | — |
Commercial paper |  |  | 37,902 |  |  |  | — |  |  |  | 37,902 |  |  |  | — |
Corporate debt securities |  |  | 9,463 |  |  |  | — |  |  |  | 9,463 |  |  |  | — |
Total assets measured at fair value |  | $ | 50,187 |  |  | $ | 2,822 |  |  | $ | 47,365 |  |  | $ | — |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2C -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2C Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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