Number of options each director received at each annual meeting.

No definition available.

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- Definition

Options vesting percentage on first and second anniversary.

+ References

No definition available.

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- Definition

Sharebased compensation arrangement by sharebased payment award number of options ungranted.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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.

+ References

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- Definition

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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- Definition

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.

+ References

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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- Definition

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

+ References

No definition available.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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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.

+ References

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- Definition

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

+ References

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-Name Accounting Standards Codification
-Topic 718
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Note 12 - Stock Option Plans (Details Textual) - USD ($)	1 Months Ended	6 Months Ended	12 Months Ended			192 Months Ended
	Aug. 31, 2000	Dec. 31, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015	Dec. 31, 2018	Jun. 30, 2015	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			40,000	60,000		840,320
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			12,000	17,000		1,314,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Total			8,000	18,000		266,680
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number			179,000	206,500		179,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number			28,500			28,500
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term			10 years	10 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total			$ 73,000			$ 73,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			1 year 182 days
Minimum [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			2 years
Maximum [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
The 2003 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		450,000			450,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					3 years
Sharebased Compensation Arrangement By Sharebased Payment Award Number Of Options Ungranted								197,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				60,000
The 2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized							750,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			20,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0	0	0
The Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	200,000
Sharebased Compensation Arrangement By Sharebased Payment Award Number Of Options Ungranted	60,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			12,000
Number Of Options Each Director Received At Each Annual Meeting	4,000
Options Vesting Percentage On First And Second Anniversary	50.00%
The Directors Plan [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	5,000
The 2011 Non-employee Director Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			8,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			12,000	17,000