Intangible Assets - Reconciliation of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ (190)us-gaap_AmortizationOfIntangibleAssets	$ (196)us-gaap_AmortizationOfIntangibleAssets	$ (579)us-gaap_AmortizationOfIntangibleAssets	$ (582)us-gaap_AmortizationOfIntangibleAssets
Net book value at end of period	2,080us-gaap_FiniteLivedIntangibleAssetsNet		2,080us-gaap_FiniteLivedIntangibleAssetsNet		2,765us-gaap_FiniteLivedIntangibleAssetsNet
Patented Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount at beginning of period			41,689	38,941	38,941
Foreign currency translation adjustments			(3,313)		2,748
Gross carrying amount at end of period	38,376		38,376		41,689
Accumulated amortization at beginning of period			(38,924)	(35,511)	(35,511)
Amortization expense			(579)		(778)
Foreign currency translation adjustments			3,207		(2,635)
Accumulated amortization at end of period	(36,296)		(36,296)		(38,924)
Net book value at end of period	$ 2,080		$ 2,080		$ 2,765

Finite lived intangible assets foreign currency translation of accumulated amortization.

No definition available.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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- Definition

Amount of increase (decrease) to assets, excluding financial assets and goodwill, lacking physical substance with a finite life for foreign currency translation adjustments.

+ References

No definition available.

+ Details

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