On the coaches register, only currently active head coaches are bolded.
A player is considered active for a given season if they are under contract at any point during the league year (which generally runs from July 1 through June 30).
What counts as under contract:
G-League players are considered active NBA players, provided they have an NBA page. Playing in the G-League for less money than they could earn overseas signals that a player is still pursuing an NBA career.
A player is marked inactive immediately, regardless of contract status, if they:
Players overseas: A former NBA player currently playing overseas is not considered active, unless they return to the NBA or the G-League.