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Commitments and Contingencies (Details Textual) $ in Millions							9 Months Ended	12 Months Ended
	Mar. 29, 2016 claim	Mar. 24, 2016 claim	Mar. 11, 2016 claim	Jun. 01, 2015 motion	Mar. 10, 2015 patent	Jan. 11, 2012 reexamination_appeal patent claim	Feb. 28, 2017 Petition reexamination_appeal	May 31, 2018 USD ($)	May 31, 2017 USD ($)	May 31, 2016 USD ($)
Loss Contingencies [Line Items]
Aggregate rental costs under operating leases | $								$ 2.8	$ 2.5	$ 2.5
Reserve | $									$ 12.5
C.R. Bard, Inc.
Loss Contingencies [Line Items]
Number of patents | patent						3
Number of petitions filed for reexamination of patents | Petition							3
The Utah Action
Loss Contingencies [Line Items]
Number of claims rejected (claim)	20	8	6			40
Number of reexaminations (reexamination appeal) | reexamination_appeal						3
Number of pending claims (claim)		10	10
Number of claims reversed (claim)		2	4
Loss contingency, new claims filed, number						41
The Utah Action | Pending Litigation
Loss Contingencies [Line Items]
Number of reexaminations (reexamination appeal) | reexamination_appeal							2
The Utah Action | C.R. Bard, Inc. | Pending Litigation
Loss Contingencies [Line Items]
Number of reexaminations (reexamination appeal) | reexamination_appeal							3
The Delaware Action
Loss Contingencies [Line Items]
Number of patents allegedly infringed (patent)				2	3

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