MARKETABLE SECURITIES AND FAIR VALUE MEASUREMENTS - AMORTIZED COST AND FAIR VALUE BY MATURITY (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Amortized Cost
Less than 1 year	$ 0
1 to 5 years	6,935
Corporate debt securities, Cost	6,935
Fair Value
Less than 1 year	0
1 to 5 years	7,466
Debt securities, fair value	$ 7,466

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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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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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, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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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), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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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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