Fair Value Measurements (Tables)

9 Months Ended

Dec. 31, 2012

Fair Value Measurements [Abstract]

Assets carried at fair value measured on a recurring basis

The following table provides the assets carried at fair value measured on a recurring basis.

Asset Class	Fair Value		Quoted Prices  in Active  Markets for  Identical Assets (Level 1)		Significant  Other Observable  Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
December 31, 2012
Short-term investments:
U.S. Government and Agency debt securities	$	3,514,000	$	-	$	3,514,000	$	-
Long-term investments:
U.S. Government and Agency debt securities		1,200,000		-		1,200,000		-
March 31, 2012
Short-term investments:
U.S. Government and Agency debt securities		1,001,000		-		1,001,000		-
Long-term investments:
U.S. Government and Agency debt securities		2,029,000		-		2,029,000		-