Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) shares in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Deposit Contracts, Assets	$ 483,712		$ 483,712		$ 446,525
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent					20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	0	0	0	0
Class of Warrant or Right, Outstanding	0	0	0	0
Allocated Share-based Compensation Expense	$ 11,476	$ 28,756	$ 12,882	$ 30,787
Foreign Currency Translation One Dollar	462	476	462	476
Environmental Exit Costs, Costs Accrued to Date	$ 0	$ 0	$ 0	$ 0
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			1 year
Property, Plant and Equipment, Useful Life			1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			10 years
Property, Plant and Equipment, Useful Life			20 years

Foreign currency translation one dollar.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Number of warrants or rights outstanding.

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Carrying amount of assets as of the balance sheet date pertaining to amounts paid by the insured (including a ceding company) under insurance or reinsurance contracts for which insurance risk is not transferred.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Carrying amount as of the balance sheet date of the liability for remediation, site restoration, postclosure, monitoring commitments, or other exit costs associated with the sale, disposal or abandonment of a particular property resulting from unanticipated contamination of the assets.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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