Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Gross number of share options (or share units) granted during the period.

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No definition available.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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Note 12 - Common Stock Options (Details Textual) - shares	12 Months Ended						156 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2004	Dec. 31, 2000	Dec. 31, 1997	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized						450,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	91 days	91 days	91 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						1 year
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0	40,049	54,000	450,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	0
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term						10 years