Note 10 - Fair Value Measurements (Details) - Discounted Cash Flow Assumptions	6 Months Ended	12 Months Ended
Jun. 30, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Time-to-liquidity (months)	24	24
Expected return	2.70%	2.90%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%	4.00%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	6.90%	7.00%

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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