A microgan or micran, symbol µγ, is one millionth of a gan
It can be written in Scientific notaion as 1×10−6 γ.
The microgan is the common unit of measurement of ideas. An average good idea may measure somewhere between +250µγ and +500µγ whereas a Crap Idea may range from 0 to around -500µγ for a real clunker. Brilliant ideas may hit the low 900's but the truly genius ideas sometimes reach 1000µγ (a milligan). These are, sadly, very rare.