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Note 14 - Financial Instruments | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Financial Instruments Disclosure [Text Block] | 14. Financial Instruments Fair value is defined by ASC 820, Fair Value Measurement (ASC 820) as the price that would be received upon selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC 820 establishes a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:
| • | Level 1 — Quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.
| • | Level 2 — Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.
| • | Level 3 — Unobservable inputs for the asset or liability.
|  | ﻿Year Ended December 31, 2021 |
|  | (in thousands) |
|  | Level 1﻿ |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasury bills |  | $ | — |  |  | $ | 199,999 |  |  | $ | — |  |  | $ | 199,999 |
Certificate of deposits |  |  | — |  |  |  | 1,433 |  |  |  | — |  |  |  | 1,433 |
Short term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificate of deposits |  |  | — |  |  |  | 2,411 |  |  |  | — |  |  |  | 2,411 |
Other assets﻿: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificate of deposits |  |  | — |  |  |  | 285 |  |  |  | — |  |  |  | 285 |
Total |  | $ | — |  |  | $ | 204,128 |  |  | $ | — |  |  | $ | 204,128 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earn-out liabilities (1) |  | $ | — |  |  | $ | — |  |  | $ | 10,012 |  |  | $ | 10,012 |
Warrant liabilities (1) |  |  | — |  |  |  | 458 |  |  |  | — |  |  |  | 458 |
Total |  | $ | — |  |  | $ | 458 |  |  | $ | 10,012 |  |  | $ | 10,470 |
|  | ﻿Year Ended December 31, 2020 |
|  | (in thousands) |
|  | Level 1﻿ |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificate of deposits |  | $ | — |  |  | $ | 919 |  |  | $ | — |  |  | $ | 919 |
Short term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificate of deposits |  |  | — |  |  |  | 992 |  |  |  | — |  |  |  | 992 |
Other assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificate of deposits |  |  | — |  |  |  | 800 |  |  |  | — |  |  |  | 800 |
Total |  | $ | — |  |  | $ | 2,711 |  |  | $ | — |  |  | $ | 2,711 |
(1) As a result of the Business Combination on July 1, 2021, the Company recorded Company Earn-Out Shares and private placement warrants as liabilities that must be marked to market each reporting period. The Company measured the Company Earn-Out Shares at fair value determined at Level 3. The Company measured the private placement warrants at fair value determined at Level 1. Refer to "Note 11 — Company Earn-Out and Warrant Liabilities" for further details.

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- Definition The entire disclosure for financial instruments. This disclosure includes, but is not limited to, fair value measurements of short and long term marketable securities, international currencies forward contracts, and auction rate securities. Financial instruments may include hedging and non-hedging currency exchange instruments, derivatives, securitizations and securities available for sale at fair value. Also included are investment results, realized and unrealized gains and losses as well as impairments and risk management disclosures. + References No definition available. + Details
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