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Marketable Securities (Held-To-Maturity Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |  |
Gross unrealized holding gains |  | $ 0 |  | $ 53 |  |
Gross unrealized holding (losses) |  | (1,325) |  | (531) |  |
Aggregate fair value | [1] | 17,996 |  | 31,788 |  |
Amortized cost basis |  | 19,321 | [2] | 32,266 | [2] | $ 50,810
Accrued interest on securities |  | 138 |  | 227 |  |
Current [Member] |  |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |  |
Gross unrealized holding gains |  | 0 |  | 43 |  |
Gross unrealized holding (losses) |  | (111) |  | (19) |  |
Aggregate fair value | [1] | 3,927 |  | 8,324 |  |
Amortized cost basis | [2] | 4,038 |  | 8,300 |  |
Non Current [Member] |  |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |  |
Gross unrealized holding gains |  | 0 |  | 10 |  |
Gross unrealized holding (losses) |  | (1,214) |  | (512) |  |
Aggregate fair value | [1] | 14,069 |  | 23,464 |  |
Amortized cost basis | [2] | $ 15,283 |  | $ 23,966 |  |
[1] | Fair value is being determined using Level 2 inputs.
[2] | Including accrued interest in the amount of US$ 227 thousand and US$ 138 thousand as of December 31, 2021 and 2022, respectively.

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- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 + Details
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