Note 10. Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Six Months ended June 30,  2012			Six Months ended June 30, 2011
Risk-free interest rate	1.60%	-	2.97%	2.72%	-	2.84%
Expected volatility	80.8	-	82.3%	80.7%	-	81.1%
Expected life (in years)	6.3	–	5.0		6.25
Expected forfeiture rate	0.0%	-	7.5%		0.0%
Expected dividend yield		0.0%			0.0%

Schedule of Shar-based Compensation, Stock Options and Restricted Stock Awards, Activity [Table Text Block]

	Stock Options					Restricted Stock Awards					Weighted Average Contractual Terms of Equity Awards (in years)
Equity Awards	Options Outstanding			Weighted Average  Exercise Price		Non-vested Restricted Stock Outstanding			Weighted Average Grant Date Fair Value
Equity awards outstanding at December 31, 2011		3,113,144		$	3.75		54,867		$	3.16
Equity awards granted		608,251		$	2.11		1,500		$	2.09
Equity awards exercised		−			−		(3,200	)	$	3.91
Equity awards forfeited, cancelled or expired		(220,669	)	$	7.57		–			–
Equity awards outstanding at June 30, 2012		3,500,726		$	3.23		53,167		$	3.08		7.14
Aggregate intrinsic value of outstanding awards at June 30, 2012	$	1,297,278				$	163,223
Equity awards exercisable at June 30, 2012		1,906,665		$	3.59							5.81
Aggregate intrinsic value of awards exercisable at June 30, 2012	$	490,186