Looks like an iceberg order..."What Does Iceberg Order Mean?A...

Looks like an iceberg order...

"What Does Iceberg Order Mean?
A large single order that has been divided into smaller lots, usually by the use of an automated program, for the purpose of hiding the actual order quantity."

http://www.investopedia.com/terms/i/icebergorder.asp

Funny thing is that given that this stock is not heavily traded, it is pretty easy to work out that there is a big buy or sell order happening. They may also try to disguise whether they are buying or selling by doing the opposite for part of the volume.

Are they primarily hitting the bid or the offer, thus are they a seller or buyer?