| Marketable Securities (Details - Contractual maturities) $ in Thousands | Jun. 30, 2022  USD ($) | 
|---|---|
| Net Investment Income [Line Items] | |
| Fair Value | $ 97,428 | 
| Due After One Year Through Five Years [Member] | |
| Net Investment Income [Line Items] | |
| Fair Value | 73,413 | 
| Due In One Years [Member] | |
| Net Investment Income [Line Items] | |
| Fair Value | 11,763 | 
| Due After Five Years Through Ten Years [Member] | |
| Net Investment Income [Line Items] | |
| Fair Value | 4,218 | 
| Due After Ten Years [Member] | |
| Net Investment Income [Line Items] | |
| Fair Value | $ 8,034 | 
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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