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Note 6 - Facility Relocation - Facility Relocation Costs (Details) - Relocation of Omaha and Traverse City Biological Indicator Manufacturing Facilities [Member] $ in Thousands	12 Months Ended
	Mar. 31, 2017 USD ($)
Beginning balance
Facility relocation expense	725
Cash payments	(52)
Ending balance	$ 673

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
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-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
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