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Note 4 - Facility Relocation - Facility Relocation Costs (Details) - Relocation of Omaha and Traverse City Biological Indicator Manufacturing Facilities [Member]	6 Months Ended
	Sep. 30, 2017 USD ($)
Beginning balance	$ 673,000
Facility relocation expense	622,000
Cash payments	(570,000)
Ending balance	$ 725,000

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
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-SubTopic 10
-Section 50
-Paragraph 1
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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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-Name Accounting Standards Codification
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-SubTopic 10
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+ References

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