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Intangibles (Details) (USD $)			1 Months Ended	6 Months Ended
	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2011 License agreement for biological indicator technology Photonic Biosystems, Inc	Sep. 30, 2012 License agreement for biological indicator technology Photonic Biosystems, Inc
Acquisition of technology
Payment for acquisition of rights of the technology			$ 175,000
Additional amount to be paid			225,000
Intangible assets	$ 16,769,000	$ 9,819,000		$ 175,000
Amortization period				10 years

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- Definition

Represents the additional payment arising from acquisition of finite-lived intangible assets and which may be made in future depending upon meeting certain development and performance milestones.

+ References

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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