Stock-Based Compensation; Changes in Equity (Details 2) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Shares, Options Outstanding (in shares)	218,500	218,500
Weighted Average, Options Outstanding (in dollars per share)	$ 5.21	$ 5.21
Remaining Life, Options Outstanding	3 years 6 months	3 years 6 months
Intrinsic Value, Options Outstanding	$ 63,130	$ 63,130
Shares, Options Vested (in shares)	71,468
Weighted Average, Options Vested (in dollars per share)	$ 4.45
Remaining Life, Option Vested	3 years 1 month 6 days
Intrinsic Value, Options Vested (in dollars)	63,130
Stock Options By Grant Date Dec 2005 [Member]
Shares, Options Outstanding (in shares)	29,500
Weighted Average, Options Outstanding (in dollars per share)	$ 2.88
Remaining Life, Options Outstanding	2 years 6 months
Intrinsic Value, Options Outstanding	63,130
Shares, Options Vested (in shares)	29,500
Weighted Average, Options Vested (in dollars per share)	$ 2.88
Remaining Life, Option Vested	2 years 6 months
Intrinsic Value, Options Vested (in dollars)	63,130
Stock Options By Grant Date Dec 2010 [Member]
Shares, Options Outstanding (in shares)	72,000
Weighted Average, Options Outstanding (in dollars per share)	$ 6.14
Remaining Life, Options Outstanding	2 years 6 months
Intrinsic Value, Options Outstanding	0
Shares, Options Vested (in shares)	17,500
Weighted Average, Options Vested (in dollars per share)	$ 5.97
Remaining Life, Option Vested	2 years 6 months
Intrinsic Value, Options Vested (in dollars)	0
Stock Options By Grant Date Jan 2011 [Member]
Shares, Options Outstanding (in shares)	8,000
Weighted Average, Options Outstanding (in dollars per share)	$ 5.96
Remaining Life, Options Outstanding	2 years 6 months
Intrinsic Value, Options Outstanding	0
Shares, Options Vested (in shares)	2,668
Weighted Average, Options Vested (in dollars per share)	$ 5.96
Remaining Life, Option Vested	2 years 6 months
Intrinsic Value, Options Vested (in dollars)	0
Stock Options By Grant Date Nov 2012 [Member]
Shares, Options Outstanding (in shares)	109,000
Weighted Average, Options Outstanding (in dollars per share)	$ 5.17
Remaining Life, Options Outstanding	4 years 4 months 24 days
Intrinsic Value, Options Outstanding	0
Shares, Options Vested (in shares)	21,800
Weighted Average, Options Vested (in dollars per share)	$ 5.17
Remaining Life, Option Vested	4 years 4 months 24 days
Intrinsic Value, Options Vested (in dollars)	$ 0