CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) Non-Cash Activities - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Other Significant Noncash Transactions [Line Items]
Unrealized gain (loss) on available-for-sale securities	$ 3,202	$ (5,031)
Net change in accounts payable and accrued expenses related to purchases of property and equipment	766	2,077
Common Stock Issued to Board of Directors and Scientific Advisory Board that was Earned and Accrued for in Previous Period [Member]
Other Significant Noncash Transactions [Line Items]
Other significant noncash transaction, value of consideration received	$ 300	$ 300