FAIR VALUE MEASUREMENTS - Fair Value Measurements Inputs (Details) - Level 3	Sep. 30, 2021	Jun. 30, 2021	May 18, 2021
Risk-free interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input			1.06
Risk-free interest rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	0.08
Risk-free interest rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	1.12
Expected life of grants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	5.82		6.0
Expected volatility of underlying stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	9.0
Expected volatility of underlying stock | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input		9.0	10.0
Expected volatility of underlying stock | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input			18.3
Dividends
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Measurement Input	0		0