Note 9. Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

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

	Nine Months ended September 30,
	2012			2011
Risk-free interest rate	1.60	-	2.97%	2.29	-	2.97%
Expected volatility	80.2	-	82.3%	72.2	-	81.1%
Expected life (in years)	5.0	-	6.25		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		623,251		$	2.11		5,544		$	2.10
Equity awards exercised		(38,750	)	$	2.70		(9,557	)	$	2.86
Equity awards forfeited, cancelled or expired		(264,669	)	$	6.80		(6,667	)		2.86
Equity awards outstanding at September 30, 2012		3,432,976		$	3.24		44,167		$	3.13	6.81
Aggregate intrinsic value of outstanding awards at September 30, 2012	$	7,723,556				$	239,385
Equity awards exercisable at September 30, 2012		2,062,954		$	3.74						5.57
Aggregate intrinsic value of awards exercisable at September 30, 2012	$	3,574,674