XML 14 R3.htm IDEA: XBRL DOCUMENT v3.21.2
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
CONDENSED CONSOLIDATED BALANCE SHEETS    
Marketable securities-amortized cost $ 283,380 $ 288,199
Marketable securities-allowance for credit losses $ 0 $ 0
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 400,000,000 400,000,000
Common stock, shares issued 220,424,569 219,489,329
Common stock, shares outstanding 220,424,569 219,489,329