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Significant Accounting Policies - Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Accounting Policies
Gain (loss) available for sale security	$ 0	$ 0	$ 0

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- References

No definition available.

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- Definition

Amount of realized gain (loss) on investment in debt and equity securities.

+ References

No definition available.

+ Details

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