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STOCKHOLDERS' EQUITY: (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Share-Based Compensation Arrangement By Share-Based Payment Award Options Vested In Period | 0 | 0 | 108,725 | 95,064
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options | $ 39,000 |  | $ 39,000 |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition |  |  | 8 months |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value (in dollars per share) |  |  | $ 3.15 |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options | 238,000 |  | 238,000 |
Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition |  |  | 13 months |
Stock-based compensation | 55,000 | 37,000 | 145,000 | 127,000
Stock Granted, Value, Share-based Compensation, Gross |  | 150,600 |  | 150,600
Repurchase Program 2013 [Member] |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  | 3,500,000 |
May 2013 Repurchase Program [Member] |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  | 1,500,000 |
January Repurchase Program 2013 [Member] |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  | 2,000,000 |
Non Executive Directors [Member] |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total | 0 |  | 109,645 |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  | 50.00% |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  | 2 years |
Non Executive Directors One [Member] |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total |  |  | 21,929 |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total |  |  | 50,000 |
Non Executive Directors Two [Member] |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total |  |  | 21,929 |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total |  |  | 50,000 |
Non Executive Directors Three [Member] |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total |  |  | 21,929 |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total |  |  | 50,000 |
Non Executive Directors Four [Member] |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total |  |  | 21,929 |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total |  |  | 50,000 |
Non Executive Directors Five [Member] |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total |  |  | 21,929 |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total |  |  | 50,000 |
Common Class A [Member] |  |  |  |
Repurchase Of Common Stock Shares | 1,100 |  | 32,669 |
Repurchase Of Common Stock Price Per Share (in dollars per share) | $ 2.41 |  | $ 2.17 |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  | 57,000 |
Repurchase Of Common Stock Value | 2,655 |  | 70,986 |
Common Class A [Member] | Stock Option and Restricted Stock Grant Plan 1999 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 1,408,099 |  | 1,408,099 |
Common Class D [Member] |  |  |  |
Repurchase Of Common Stock Shares | 512,300 |  | 2,630,574 |
Repurchase Of Common Stock Price Per Share (in dollars per share) | $ 2.36 |  | $ 2.05 |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  | 57,000 |
Repurchase Of Common Stock Value | $ 1,209,108 |  | $ 5,397,734 |
Common Class D [Member] | Stock Option and Restricted Stock Grant Plan 1999 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 10,816,198 |  | 10,816,198 |
Common Class D [Member] | Stock Plan 2009 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 8,250,000 |  | 8,250,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 4,614,627 |  | 4,614,627 |
Common Class D [Member] | Amended and Restated 2009 Stock Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 7,000,000 |  | 7,000,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee |  |  | 1,000,000 |

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- Definition This element represents that, the repurchase Class A common stock. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References No definition available. + Details
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- Definition Number of options vested by share based payment award options of share based compensation arrangement. + References No definition available. + Details
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- Definition This element represents unrecognized compensation is expected to be recognized for equity-based compensation plans. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References No definition available. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The highest quantity of shares an employee can purchase under the plan per period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP). + References No definition available. + Details
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- Definition Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of a stock repurchase plan authorized by an entity's Board of Directors. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors. + References No definition available. + Details
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