Annual report pursuant to Section 13 and 15(d)

EQUITY COMPENSATION - Fair Value for Options Granted under Employee Stock Purchase Plan (Details)

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EQUITY COMPENSATION - Fair Value for Options Granted under Employee Stock Purchase Plan (Details) - Employee Stock
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Risk-free Interest Rate 0.09% 0.12% 1.73%
Dividend Yield 0.00% 0.00% 0.00%
Volatility Factor 0.71% 1.00% 0.53%
Expected Life in Years 1 year 1 year 1 year