Share-based compensation (Tables)

12 Months Ended

Dec. 31, 2014

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,
		2014		2013
Assumptions (weighted average)
Volatility		100%		96%
Expected term (in years)		4.0		4.1
Risk-free rate		1.3%		1.0%
Expected dividends		0.0%		0.0%
Pre-vest forfeiture rate		8.5%		8.5%
Grant date fair value of options granted	$	1.22	$	1.49

Options activity and positions

The following table summarizes activity and positions with respect to options for the two years ended December 31, 2014:

				Weighted
				Average
			Weighted	Remaining
			Average	Contractual		Aggregate
			Exercise	Term		Intrinsic
Options	Shares		Price	(years)		Value
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
Granted	717,000		1.78	-		-
Exercised	-		-	-		-
Forfeited or expired	(195,000)		9.49	-		-
Outstanding as of December 31, 2014	2,427,000	$	6.72	7.4	$	18,700
Vested and expected to vest as of December 31, 2014	2,293,000	$	7.00	7.3	$	18,100
Exercisable as of December 31, 2014	1,263,000	$	11.06	5.9	$	14,100