(2) Share-Based Payment Arrangements (Details 2) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Notes to Financial Statements
Number of Options Outstanding, Beginning	12,164,102	14,456,732	14,456,722		14,456,722
Number of Options Granted	1,093,500	408,000	521,200
Number of Options Exercised		(187,680)	(82,900)
Number of Options Cancelled	(8,250)	(666,380)	(10,000)
Number of Options Forfeited	(822,029)	(1,846,570)	(428,290)
Number of Options Outstanding, Ending	12,427,323	12,164,102	14,456,732		12,427,323
Number of Options Exercisable	7,713,914				7,713,914
Weighted Average Exercise Price Outstanding, Beginning	$ 4.89	$ 4.83	$ 4.95		$ 4.95
Weighted Average Exercise Price Granted	$ 1.94	$ 3.21	$ 2.94
Weighted Average Exercise Price Exercised	$ 0	$ 2.24	$ 2.45
Weighted Average Exercise Price Canceled	$ 4.12	$ 5.09	$ 7.98
Weighted Average Exercise Price Forfeited	$ 4.63	$ 4.28	$ 6.88
Weighted Average Exercise Price Outstanding, Ending	$ 4.65	$ 4.89	$ 4.83		$ 4.65
Weighted Average Exercise Price Exercisable	$ 5.64				$ 5.64
Weighted Average Remaining Contractual Life (in years) Outstanding	6 years 4 months 21 days	6 years 5 months 14 days	6 years 1 month 13 days
Weighted Average Remaining Contractual Life (in years) Exercisable	4 years 11 months 1 day
Aggregate Intrinsic Value Outstanding, Beginning	$ 453,155	$ 5,497,712
Aggregate Intrinsic Value Exercised				91,139	266,862	405,961
Aggregate Intrinsic Value Outstanding, Ending	567,399	453,155	5,497,712		567,399
Aggregate Intrinsic Value Exercisable	$ 116,094				$ 116,094