It appears you've got some smart venture capitalists who've recently put in $$$ at over $5 a share.
26-Jan-10 NEW LEAF VENTURES II, L.P.
Beneficial Owner (10% or more) 388,350 Direct Purchase at $5.15 per share. $2,000,002
26-Jan-10 MARXE AUSTIN W & GREENHOUSE DAVID M
Beneficial Owner (10% or more) 388,350 Indirect Purchase at $5.15 per share. $2,000,002
21-Jan-10 VENROCK ASSOCIATES V LP
Beneficial Owner (10% or more) 388,350 Indirect Purchase at $5.15 per share. $2,000,002
For all practical purpose, these investors have essentially taken the company private and have only left enough float to maintain nasdaq's listing requirements. Of course the downside is that there is very little liquidity and a lot of volatility.