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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]    
Marketable securities-amortized cost $ 294,371 $ 292,580
Marketable securities-allowance for credit losses $ 0 $ 0
Preferred stock, par value (in USD per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in USD per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 400,000,000 400,000,000
Common stock, shares issued (in shares) 223,338,330 222,746,719
Common stock, shares outstanding (in shares) 223,338,330 222,746,719