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Note 11 - Investment in Joint Venture and Other Investment - Investment in Joint Venture (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Balance	$ 4,000,000	$ 4,000,000

X

- Definition

Amount of investments, and noncurrent assets classified as other.

+ References

No definition available.

+ Details

Name:	us-gaap_InvestmentsAndOtherNoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant