Intangible Assets

6 Months Ended

Dec. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

3.	Intangible Assets

The reconciliation of intangible assets for the six months ended December 31, 2013 and for the year ended June 30, 2013 was as follows (in thousands):


	Six Months Ended			Year Ended
	December 31, 2013			June 30, 2013

Patented technologies
Gross carrying amount at beginning of period	$	38,941		$	39,556
Foreign currency translation adjustments		1,933			(615	)


Gross carrying amount at end of period		40,874			38,941


Accumulated amortization at beginning of period		(35,511	)		(35,330	)
Amortization expense		(386	)		(769	)
Foreign currency translation adjustments		(1,850	)		588


Accumulated amortization at end of period		(37,747	)		(35,511	)


Net book value at end of period	$	3,127		$	3,430

The Company amortizes its intangible assets with finite lives on a straight-line basis over their respective estimated useful lives. Amortization of intangible assets totaled $194,000 for each of the three month periods ended December 31, 2013 and 2012, as well as $386,000 for each of the six month periods ended December 31, 2013 and 2012. The carrying value of intangible assets at December 31, 2013 of $3.1 million (approximately $2.1 million attributable to the Durasert technology and $1.0 million attributable to the BioSilicon technology) is expected to be amortized on a straight-line basis over the remaining estimated useful life of 4.0 years, or approximately $782,000 per year.