Intangible Assets

3 Months Ended

Jun. 30, 2012

Intangible Assets [Abstract]

Intangible Assets

7. 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
June 30, 2012	$	5,591,000	$	4,856,000	$	735,000
March 31, 2012		5,586,000		4,640,000		946,000

At June 30, 2012, we estimate the following annual amortization for these assets in subsequent fiscal years:

Remainder of 2013	$	647,000
2014		24,000
2015		23,000
2016		21,000
2017 and beyond		20,000
	$	735,000