Share-based compensation (Tables)

12 Months Ended

Dec. 31, 2013

Summary Of Significant Accounting Policies Share-Based Compensation Tables

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

The following table summarizes the weighted-average valuation assumptions and weighted-average grant date fair value of options granted during the periods shown below:

		Year Ended December 31,
		2013		2012
Assumptions (weighted average)
Volatility		96%		98%
Expected term (in years)		4.1		4.5
Risk-free rate		1.0%		0.6%
Expected dividends		0.0%		0.0%
Pre-vest forfeiture rate		8.5%		8.5%
Grant date fair value of options granted	$	1.49	$	1.39

Options activity and positions

The following table summarizes activity and positions with respect to options for the two years ended December 31, 2013:

				Weighted
				Average
			Weighted	Remaining
			Average	Contractual		Aggregate
			Exercise	Term		Intrinsic
Options	Shares		Price	(years)		Value
Outstanding as of December 31, 2011	964,000	$	24.00	5.8	$	-
Granted	671,000		1.97
Exercised	(16,000)		1.80
Forfeited or expired	(301,000)		21.20
Outstanding as of December 31, 2012	1,318,000		13.71	6.8		-
Granted	824,000		2.22
Exercised	(23,000)		1.80
Forfeited or expired	(214,000)		13.86
Outstanding as of December 31, 2013	1,905,000	$	8.86	7.4	$	1,500
Vested and expected to vest as of December 31, 2013	1,797,000	$	9.26	7.3	$	1,443
Exercisable as of December 31, 2013	934,000	$	15.41	5.6	$	750