FAIR VALUE MEASUREMENTS - Assets and Liabilities at Fair Value, Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets:
Total cash and cash equivalents	$ 5,250,516	$ 6,102,017
Total assets	5,276,348	6,125,196
Liabilities:
Total liabilities	871,478	1,394,808
Common stock warrant liability
Liabilities:
Common stock warrant liability	871,478	1,394,808
Money market funds
Assets:
Total cash and cash equivalents	5,250,516	6,102,017
Money market funds	25,832	23,179
Level 1
Assets:
Total cash and cash equivalents	5,250,516	6,102,017
Total assets	5,276,348	6,125,196
Liabilities:
Total liabilities	0	0
Level 1 | Common stock warrant liability
Liabilities:
Common stock warrant liability	0	0
Level 1 | Money market funds
Assets:
Total cash and cash equivalents	5,250,516	6,102,017
Money market funds	25,832	23,179
Level 2
Assets:
Total cash and cash equivalents	0	0
Total assets	0	0
Liabilities:
Total liabilities	0	0
Level 2 | Common stock warrant liability
Liabilities:
Common stock warrant liability	0	0
Level 2 | Money market funds
Assets:
Total cash and cash equivalents	0	0
Money market funds	0	0
Level 3
Assets:
Total cash and cash equivalents	0	0
Total assets	0	0
Liabilities:
Total liabilities	871,478	1,394,808
Level 3 | Common stock warrant liability
Liabilities:
Common stock warrant liability	871,478	1,394,808
Level 3 | Money market funds
Assets:
Total cash and cash equivalents	0	0
Money market funds	$ 0	$ 0