| Schedule of Estimated Fair Value of Financial Instrument (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended | 
|---|---|---|
| Jun. 30, 2022 | Dec. 31, 2021 | |
| Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] | ||
| Cost | $ 18,397 | $ 23,040 | 
| Unrealized gains | ||
| Unrealized losses | (30) | (29) | 
| Fair value | 18,367 | 23,011 | 
| Short-Term Investments [Member] | ||
| Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] | ||
| Cost | 18,397 | 23,040 | 
| Unrealized gains | ||
| Unrealized losses | (30) | (29) | 
| Fair value | $ 18,367 | $ 23,011 | 
| X | ||||||||||
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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| X | ||||||||||
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- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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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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| X | ||||||||||
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- Details 
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