Intangible Assets

6 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

3. Intangible Assets

The reconciliation of intangible assets for the six months ended December 31, 2015 and for the year ended June 30, 2015 was as follows (in thousands):


	Six Months Ended			Year Ended
	December 31, 2015			June 30, 2015
Patented technologies
Gross carrying amount at beginning of period	$	39,710		$	41,689
Foreign currency translation adjustments		(1,382	)		(1,979	)

Gross carrying amount at end of period		38,328			39,710

Accumulated amortization at beginning of period		(37,785	)		(38,924	)
Amortization expense		(382	)		(770	)
Foreign currency translation adjustments		1,351			1,909

Accumulated amortization at end of period		(36,816	)		(37,785	)

Net book value at end of period	$	1,512		$	1,925

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 $190,000 and $193,000 for the three months ended December 31, 2015 and 2014, respectively, and $382,000 and $389,000 for the six months ended December 31, 2015 and 2014, respectively. The carrying value of intangible assets at December 31, 2015 of $1.5 million (approximately $1.1 million attributable to the Durasert technology and $453,000 attributable to the BioSilicon technology (including Tethadur)) is expected to be amortized on a straight-line basis over the remaining estimated useful life of 2.0 years, or approximately $756,000 per year.