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FAIR VALUE MEASUREMENTS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Available-for-sale securities
Available-for-sale securities	$ 0	$ 0
Fair value transfers between levels
Transfers from Level 1 to Level 2	0
Transfers from Level 2 to Level 1	0
Transfers into Level 3	0
Transfers out of Level 3	0
Fair value on a recurring basis
Available-for-sale securities
Investments measured at Net Asset Value - Trading securities	$ 12,264,000	$ 10,622,000

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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