Number of Executives

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- Definition

Percentage of stock option exercisable per year

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- Definition

Share-based compensation arrangement by share-based payment award, options, vested in period, total fair value

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Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period

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- Definition

Stock option expiration period

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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.

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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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.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

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

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

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.

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- Definition

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

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No definition available.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Number of non-vested options outstanding.

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No definition available.

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Share-Based Compensation (Narrative) (Details)	1 Months Ended		12 Months Ended
Share-Based Compensation (Narrative) (Details)	Feb. 28, 2019 shares	Feb. 28, 2018 executive shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 shares	Feb. 28, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)			67,500	67,500
Vesting term			4 years
Options forfeited	10,000		0
Intrinsic value of stock options exercised \| $				$ 217,064	$ 42,000
Total fair value of stock options vested \| $			$ 141,584	$ 141,584	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period			3 years
Restricted Stock And Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU available for issuance (in share)			0	0	75,250	169,000
Granted, shares (in shares)			0	0	0
2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)							4,900,000
Options granted during period			0	0
Compensation expense not yet recognized \| $			$ 200,000
Compensation expense not yet recognized, period for recognition			1 year 1 month 6 days
2015 Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options available for issuance (in shares)		80,000
Number of executives \| executive		4
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock option exercisable per year			25.00%
Stock option expiration period (in years)			10 years
Common Stock [Member] \| 2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)			70,000
Number of shares available for issuance (in shares)			4,830,000