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U.S. Government Securities (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Gross unrealized gains	$ 1,600,000
Gross unrealized losses	0
Carrying Value
Due in 1 year	129,321,000
TOTAL	129,321,000	$ 135,115,000
Fair Value
Due in 1 year	130,910,000
TOTAL	$ 130,910,000

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