My guess is market marker(s) was trying to create a market by trading their own shares even with small trading volume, or trying to build up their shares inventories for near term opportune times ahead (pre/post SCOTUS' Oil States and CAFC's Worlds decisions)
Sometime people face with personal/family emergencies, margin calls, or see much better places to put their money; and therefore have to get out of at all cost. Such sell desperations even with not extremely high volume can oftentime drive down the shareprice of highly illiquid or low float stocks.