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