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v3.23.1

Note 2 - Summary of Significant Accounting Policies (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Notes Tables |
Schedule of Cash and Cash Equivalents [Table Text Block] |
|  | March 31, |  |  | March 31, |
|  | 2023 |  |  | 2022 |
Cash |  | $ | 13,505 |  |  | $ | 34,174 |
Cash equivalents |  |  | 2,193 |  |  |  | — |
Restricted cash and cash equivalents included in current assets |  |  | — |  |  |  | 1,066 |
Total cash, cash equivalents, and restricted cash and cash equivalents shown in the Condensed Consolidated Statements of Cash Flows |  | $ | 15,698 |  |  | $ | 35,240 |
Debt Securities, Held-to-Maturity [Table Text Block] |
|  | As of |
Held-to-maturity debt securities: |  | March 31, 2023 |  |  | December 31, 2022 |
Amortized cost |  | $ | 18,121 |  |  | $ | 9,341 |
Gross unrecognized gains |  |  | — |  |  |  | — |
Gross unrecognized losses |  |  | (148 | ) |  |  | (168 | )
Fair value |  | $ | 17,973 |  |  | $ | 9,173 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized Cost |  |  | Fair Value |
Within one year |  | $ | 11,067 |  |  | $ | 11,012 |
After one year through two years |  |  | 5,607 |  |  |  | 5,535 |
After two years through three years |  |  | 1,447 |  |  |  | 1,426 |
Total |  | $ | 18,121 |  |  | $ | 17,973 |
Financing Receivable, Allowance for Credit Loss [Table Text Block] |
At January 1, 2022 |  | $ | 223 |
Provision charged to expense |  |  | (19 | )
(Write-offs) / Recoveries |  |  | (94 | )
At December 31, 2022 |  | $ | 110 |
Provision charged to expense |  |  | — |
(Write-offs) / Recoveries |  |  | — |
At March 31, 2023 |  | $ | 110 |

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