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Represents the number of additional grants of options during the period.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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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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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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The weighted average fair value at grant date for nonvested equity-based awards issued 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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Number of shares authorized for issuance under share-based payment arrangement.

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

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

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Purchase price of common stock expressed as a percentage of its fair value.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Note 13 - Stock-based Compensation (Details Textual)			1 Months Ended								3 Months Ended			9 Months Ended	12 Months Ended
Note 13 - Stock-based Compensation (Details Textual)	Aug. 16, 2021	May 29, 2014 shares	Apr. 30, 2021 USD ($) $ / shares	Mar. 31, 2021 $ / shares shares	Aug. 31, 2020 USD ($) $ / shares shares	Apr. 30, 2020 $ / shares shares	Mar. 31, 2020 $ / shares shares	Jan. 31, 2020 $ / shares shares	May 31, 2019 $ / shares shares	Apr. 30, 2019 $ / shares shares	Jun. 30, 2020 shares	Mar. 31, 2020 shares	Mar. 31, 2019 shares	Sep. 30, 2021 USD ($) shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) \| shares															0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value \| $															$ 203,000	$ 759,000	$ 953,000
Share-based Payment Arrangement, Expense \| $															441,000	461,000	912,000
Share-based Payment Arrangement, Expense, Tax Benefit \| $															$ 110,000	$ 100,000	$ 200,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Diluted (in dollars per share) \| $ / shares															$ 0.03	$ 0.06	$ 0.12
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Basic (in dollars per share) \| $ / shares															$ 0.02
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $															$ 1,847,000
Director [Member] \| Salaries, Wages and Benefits [Member]
Share-based Payment Arrangement, Expense \| $														$ 80,000		$ 90,000	$ 100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period (in shares) \| shares													410	326
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) \| shares															7,608
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares															$ 30.40
Stock Award [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) \| shares						484
Accrual Shares to Each Non-employee Director [Member] \| Nine Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period (in shares) \| shares											484	652
Stock Split To [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
The 2014 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) \| shares		1,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) \| shares															0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares) \| shares															0	0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) \| shares															716,000
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) \| shares				2,608			5,216		426	3,690
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares				$ 30.85		$ 20.70	$ 15.38		$ 23.53	$ 24.47
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) \| shares					26,664			14,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares			$ 30.17		$ 15.13			$ 28.23
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares \| $			$ 5,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years		4 years			4 years
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) \| shares					80,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares					$ 17.69
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Chief Executive Officer [Member] \| The 2024 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares \| $					$ 10,000
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Chief Executive Officer [Member] \| The 2025 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares \| $					20,000
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Chief Executive Officer [Member] \| The 2022 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares \| $					10,000
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Chief Executive Officer [Member] \| The 2023 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares \| $					10,000
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Chief Executive Officer [Member] \| The 2027 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares \| $					10,000
The 2014 Stock Option Plan [Member] \| Stock Award [Member] \| Chief Executive Officer [Member] \| The 2026 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares \| $					$ 20,000
The 2014 Stock Option Plan [Member] \| Minimum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%