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INVESTMENT IN AN AFFILIATED COMPANY (Acquisition of Stocks of FAvS) (Narrative) (Details) (USD $) | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  | 1 Months Ended
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Jun. 30, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Jun. 30, 2011 Payment Guarantee [Member] | Dec. 31, 2012 Payment Guarantee [Member] | Oct. 01, 2010 Payment Guarantee [Member] | Dec. 04, 2009 Payment Guarantee [Member] | Dec. 31, 2013 First Aviation Services, Inc. [Member] | Dec. 31, 2012 First Aviation Services, Inc. [Member] | Dec. 31, 2011 First Aviation Services, Inc. [Member] | Dec. 31, 2010 First Aviation Services, Inc. [Member] | Dec. 31, 2009 First Aviation Services, Inc. [Member] | Dec. 04, 2009 First Aviation Services, Inc. [Member] | Mar. 18, 2013 First Aviation Services, Inc. [Member] API [Member] | Jun. 30, 2012 First Aviation Services, Inc. [Member] Convertible Debt [Member] | Jun. 30, 2011 First Aviation Services, Inc. [Member] Chief Executive Officer [Member] | Mar. 31, 2013 First Aviation Services, Inc. [Member] Term Loan [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of investee acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | 288,334 |  |  |  |
Investee ownership percentage |  |  |  |  |  |  |  |  | 29.36% |  | 30.30% | 36.60% |  | 37.00% |  |  |  |
Value of preferred stocks owned |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |
Preferred stock, cash dividend rate |  |  |  |  |  |  |  |  |  |  |  |  | 12.00% |  |  |  |  |
Preferred stock, stock dividend rate |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |
Investment in affiliated company |  |  | 3,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum guarantee |  |  |  |  |  | 4,600,000 | 6,600,000 | 7,000,000 |  |  |  |  |  |  |  |  |  |
Amount of guarantee secured |  |  |  |  |  | 2,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Monthly amortization related to guarantee agreement |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Payment for settlement | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,113 |
Market price of stock |  |  |  |  |  |  |  |  | $ 6.60 | $ 7.0 | $ 5.45 |  |  |  |  |  | $ 18.06 |
Shares issued to directors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |
Gain from dilution of interests in affiliated company |  |  |  | 240,000 |  |  |  |  |  |  | 240,000 |  |  |  |  |  |  |
Impairment of equity method investment |  |  |  |  |  |  |  |  |  | (3,300,000) |  | 1,813,000 |  |  |  |  |  |
Loss from equity method investments |  | 1,025,000 | (3,756,000) | 331,000 |  |  |  |  |  | (456,000) |  |  |  |  |  |  |  |
Repayments of lines of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,900 |  |  | 4,000,000
Original amount of debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |  |
Exercise price of warrants issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,000 |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,500 |  |  |
Percentage of post-exercise shareholders' equity callable by warrant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |
Write down |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,500 |  |  |

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