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Note 12 - Operating Leases (Details Textual)	Mar. 31, 2019 ft²
Administrative, Research and Development, and Manufacturing Space in Bedford, MA [Member]
Area of Real Estate Property	134,000
Office, Research and Development, Training, and Warehousing Space in Padova, Italy [Member]
Area of Real Estate Property	33,000

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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: