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Note I - Income Taxes (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Canada Revenue Agency [Member] | Earliest Tax Year [Member] | Foreign Tax Authority [Member]
Open Tax Year	2012
Statute of Limitations	3 years
Income Tax Examination, Penalties and Interest Expense	$ 0	$ 0

X

- Definition

Number of years for the statute of limitations to run.

+ References

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X

- Definition

The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319

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- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
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-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319

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