Share-based Compensation Stock Option Activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price per share	$ 0.69
Weighted-Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Begining balance	$ 6.21
Weighted-Average Exercise Price, Granted	$ 0.00
Weighted-Average Excercise Price, Exercised	$ 0.00
Weighted-Average Exercise Price, Cancelled/expired	$ 4.32
Weighted-Average Exercise Price, Ending balance	$ 6.21
Weighted-Average Excercise Price, Exercisable at the end of period	$ 6.35
Weighted-Average Excercise Price, Vested and expected to vest at the end of period	$ 6.36
Aggregate Intrinsic Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	0
Share-based Compensation Arrangement be Share-based Payment Award, Options, Outstanding, Expected to Vest, Weighted Average Remaining Contractual Life	5 years 3 months 29 days
Stock Options [Member]
Number of Shares [Roll Forward]
Stock Options Number of Shares, Begining balance	644,446
Stock Options Number of Shares, Granted	0
Stock Options Number of Shares, Exercised	0
Stock Options Number of Shares, Cancelled/expired	(2,000)
Stock Options Number of Shares, Ending balance	642,446
Stock Options Number of Shares, Exercisable at the end of the period	575,571
Stock Options Number of Shares, Vested and expected to vest at the end of period	638,346
Average Remaining Contractual Life (Years) [Abstract]
Average Remaining Contractual Life, Ending balance (in years)	5 years 6 months 28 days
Average Remaining Contractual Life, Exercisable (in years)	5 years 5 months 8 days
Average Remaining Contractual Life, Vested and expected to vest at the end of period (in years)	5 years 5 months 5 days
Aggregate Intrinsic Value [Abstract]
Aggregate Intrinsic Value, Outstanding at the ending period, Intrinsic Value	3,000
Aggregate Intrinsic Value, Exercisable at the ending period, Intrinsic Value	3,000
Aggregate Instrinsic Value, Option vested and expected to vest at the end of period, Intrinsic Value	$ 0
Common Stock, Capital Shares Reserved for Future Issuance	409,059