llows: 2015 U.S. Treasury Bills due Amortized Cost Gross Unrealized Fair Value Gains Losses within one year $ 21,122 $ $ (18) $ 21,104 U.S. Treasury Note due within one year 100 100 $ 21,222 $ - $ (18) $ 21,204 2014 U.S. Treasury Bills due within one year $ 11,490 $ - $ (8) $ 11,482