FAIR VALUE MEASUREMENTS - EQUITY INVESTMENT (Details) - USD ($) |
3 Months Ended | ||
---|---|---|---|
Aug. 03, 2020 |
Mar. 31, 2021 |
Dec. 31, 2007 |
|
Equity Investments [Line Item] | |||
Number of shares owned | 35,990,825 | 0 | 13,842,625 |
Business Combination Cost Of Acquired Entity Equity Interests Issued And Issuable Fair Value Method | we received 13 BARD1 shares for every five shares of Sienna ordinary shares, resulting in our ownership of 35,990,825 shares of BARD1. | ||
Realized investment gains (losses) | $ 1,233,000 | ||
Maximum | |||
Equity Investments [Line Item] | |||
Cost method investments ownership percentage | 20.00% | ||
Equity investment | |||
Equity Investments [Line Item] | |||
Cost method investments cost basis | $ 0 |