Intangible Assets

9 Months Ended

Dec. 31, 2011

Intangible Assets [Abstract]

Intangible Assets

6. Intangible Assets

Our intangible assets are comprised of patents which we amortize on a straight-line basis over their estimated useful lives of six years.

	Gross carrying amount		Accumulated amortization			Net value
December 31, 2011	$	5,586,000	$	(4,425,000	)	$	1,161,000
March 31, 2011		5,508,000		(3,783,000	)		1,725,000

At December 31, 2011, we estimate the following annual amortization for these assets in subsequent fiscal years:

Remainder of 2012	$	215,000
2013		862,000
2014		24,000
2015		22,000
2016 and beyond		38,000
	$	1,161,000