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Borrowings from Officer (Details) (USD $) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 G. Ward Paxton, chief executive officer Revolving promissory note | Feb. 09, 2012 G. Ward Paxton, chief executive officer Revolving promissory note | Feb. 07, 2013 G. Ward Paxton, chief executive officer Revolving promissory note Subsequent event
Borrowing from Officer |  |  |  |  |
Maximum borrowing capacity |  |  | $ 2,200,000 | $ 2,200,000 | $ 2,200,000
Floating rate base |  |  | prime rate |  |
Percentage points added in interest rate |  |  | 1.00% |  |
Interest rate (as a percent) |  |  | 5.00% |  |
Loan payable to officer | 1,530,000 | 1,530,000 | 1,530,000 |  |
Accrued interest | $ 130,000 | $ 54,000 | $ 130,000 |  |

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