6. Stock Based Plans (Details) - Phantom Stock Plan - USD ($)	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Description	On April 1, 2006, the Company adopted the Omega Flex, Inc. 2006 Phantom Stock Plan (the “Plan”). The Plan authorizes the grant of up to 1 million units of phantom stock to employees, officers or directors of the Company and of any of its subsidiaries. The phantom stock units ('Units') each represent a contractual right to payment of compensation in the future based on the market value of the Company’s common stock. The Units are not shares of the Company’s common stock
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	The phantom stock units ('Units') each represent a contractual right to payment of compensation in the future based on the market value of the Company's common stock. The Units are not shares of the Company's common stock, and a recipient of the Units does not receive any of the following: (a) ownership interest in the Company, (b) shareholder voting rights, and (c) other incidents of ownership to the Company's common stock. The Units are granted to participants upon the recommendation of the Company's CEO, and the approval of the Compensation Committee. Each of the Units that are granted to a participant will be initially valued by the Compensation Committee, and at a minimum, the Unit's value will be equal to the closing price of the Company's common stock on the grant date. The Units follow a vesting schedule, with a maximum vesting of 3 years after the grant date. Upon vesting, the Units represent a contractual right of payment for the value of the Unit. The Units will be paid on their maturity date, one year after all of the Units granted in a particular award have fully vested, unless an acceptable event occurs under the terms of the Plan prior to one year, which would allow for earlier payment. The amount to be paid to the participant on the maturity date is dependent on the type of Unit granted to the participant.
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights	The Units follow a vesting schedule, with a maximum vesting of three years after the grant date. Upon vesting, the Units represent a contractual right of payment for the value of the Unit.
Unvested units outstanding	20,921		20,335
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	10,460
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 30.57
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid	$ 311,000
Fair Value, Option, Methodology and Assumptions	The Company uses the Black-Scholes option pricing model as its method for determining fair value of the Units. The Company uses the straight-line method of attributing the value of the stock-based compensation expense relating to the Units. The compensation expense (including adjustment of the liability to its fair value) from the Units is recognized over the vesting period of each grant or award.
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent	$ 1,003,000		$ 905,000
Deferred Compensation Share-based Arrangements, Liability, Current	348,000		310,000
Deferred Compensation Share-based Arrangements, Liability, Classified, Noncurrent	655,000		$ 595,000
Allocated Share-based Compensation Expense	409,000	$ 104,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 532,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 3 months 18 days

Represents the Unvested units outstanding (number of shares), as of the indicated date.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable after one year (or the operating cycle, if longer).

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No definition available.

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

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Unrecognized cost of unvested share-based compensation awards.

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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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This item represents the annual disclosure of the methods and significant assumptions used to estimate the fair value of items for which the fair value option has been elected. This disclosure would not reflect the disclosure of the methodology and assumptions for items otherwise required to be reported at fair value and, therefore, for which the fair value option has not been elected or is not applicable.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 31
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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

+ References

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-Name Accounting Standards Codification
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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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Amount of cash paid related to share-based compensation liabilities.

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

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Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

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