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.

+ Details

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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

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

+ References

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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

+ Details

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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.

+ Details

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- Definition

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.

+ References

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-Name Accounting Standards Codification
-Topic 505
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Note 10 - Stock Option Plans (Details Textual) - USD ($)	1 Months Ended	12 Months Ended			204 Months Ended
	Aug. 31, 2000	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2015	Dec. 31, 2019	Jun. 30, 2015	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		107,000	40,000		947,320
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		42,000	12,000		1,356,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Total		16,000	8,000		282,680
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		84,500	179,000		84,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number		42,000			42,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		10 years	10 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 414,000			$ 414,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		1 year 182 days
Minimum [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		2 years
Maximum [Member] \| Share-based Payment Arrangement, 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
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		25,000	0
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		0	20,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		30,000	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		8,000	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		74,000	8,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		12,000	12,000