You have to dig through multiple Qs to get the whole ARS picture.
http://www.sec.gov/Archives/edgar/data/836564/000101968710001352/patriot_10q-022810.htm
At February 28, 2010, the fair value of our auction rate securities was estimated at $7.4 million based on a valuation by Houlihan Smith & Company, Inc.
Obviously they've sold some since then but they've also previously taken impariments and, IIRC, realized losses.