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Note 7 - Prepaid Expenses and Other Assets (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cost Method Investments, Fair Value Disclosure	$ 3,887	$ 1,441

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- Definition

Fair value portion of investments accounted under the cost method.

+ References

No definition available.

+ Details

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