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Note 10 - Derivative Financial Instruments - Foreign Currency Exchange Contracts (Details)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 CAD	Mar. 31, 2017 GBP (£)	Mar. 31, 2017 EUR (€)	Jun. 30, 2016 USD ($)	Jun. 30, 2016 CAD	Jun. 30, 2016 GBP (£)	Jun. 30, 2016 EUR (€)
Derivative, Notional Amount | $	$ 20,000
Euro Member Countries, Euro
Derivative, Notional Amount | €				€ 21,362				€ 2,477
United Kingdom, Pounds
Derivative, Notional Amount | £			£ 6,750				£ 594
Canada, Dollars
Derivative, Notional Amount | CAD		CAD 16,600

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CurrencyAxis=currency_CAD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: