A stock with a Bid 0.0001 Ask 0.0002, trades at between those two numbers.
A stock that has a Bid 0.0001 - Ask 0.0002, can, and is traded, between those two numbers
You, as a "Retail" investor/trader, are NOT able to do this through a regular brokerage such as Scottrade, however, there are other "Brokerage Firms" that do allow this to be done.
0.0001 is the lowest price, that a "Retail" Buyer can Buy at.