(2) Share-Based Payment Arrangements (Details 2) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Notes to Financial Statements
Number of Options Outstanding, Beginning	10,876,047	11,360,842		11,360,842
Number of Options Granted	1,812,000	70,000
Number of Options Exercised	0	310,000
Number of Options Forfeited	1,334,592	224,795
Number of Options Expired	152,500	20,000
Number of Options Outstanding, Ending	11,200,955	10,876,047		11,200,955
Number of Options Exercisable	7,173,298			7,173,298
Weighted Average Exercise Price Outstanding, Beginning	$ 4.72	$ 4.66		$ 4.66
Weighted Average Exercise Price Granted	$ 1.38	$ 2.31
Weighted Average Exercise Price Exercised	$ 0.00	$ 2.25
Weighted Average Exercise Price Forfeited	$ 4.04	$ 4.56
Weighted Average Exercise Price Expired	$ 5.44	$ 3.96
Weighted Average Exercise Price Outstanding, Ending	$ 4.25	$ 4.72		$ 4.25
Weighted Average Exercise Price Exercisable	$ 5.46			$ 5.46
Weighted Average Remaining Contractual Life (in years) Outstanding	5 years 11 months 5 days	6 years 1 month 17 days
Weighted Average Remaining Contractual Life (in years) Exercisable				4 years 1 month 6 days
Aggregate Intrinsic Value Outstanding, Beginning	$ 1,136,141
Aggregate Intrinsic Value Exercised	0		188,609	121,819	266,862
Aggregate Intrinsic Value Outstanding, Ending	15,505	1,136,141		15,505
Aggregate Intrinsic Value Exercisable	$ 0			$ 0