INVESTMENTS (Details) - Debt Securities, Available-for-sale and Held-to-Maturity $ in Thousands	Mar. 31, 2021 USD ($)
INVESTMENTS (Details) - Debt Securities, Available-for-sale and Held-to-Maturity [Line Items]
Amortized Cost	$ 8,957
Unrealized Gains	14,970
Unrealized Losses	0
Fair Value	23,927
Corporate Debt Securities [Member] \| Held-to-maturity Securities [Member]
INVESTMENTS (Details) - Debt Securities, Available-for-sale and Held-to-Maturity [Line Items]
Amortized Cost, Held-to-maturity	1,000
Unrealized Gains, Held-to-maturity	0
Unrealized Losses, Held-to-maturity	0
Fair Value, Held-to-maturity	$ 1,000

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on 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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Amortized cost 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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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date.

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Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), classified as noncurrent.

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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