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Share-based compensation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

A summary of the Company’s restricted stock as of June 30, 2013 is presented below:

	Number of shares		Weighted average grant date fair value
Non-vested at December 31, 2012		314,667	$	5.20
Granted		-		-
Vested		(137,331)		5.35
Forfeited		–		–
Non-vested at June 30, 2013		177,336	$	5.08

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

The Company has recorded the following amounts related to its share-based compensation expense in the accompanying Condensed Consolidated Statements of Operations and Comprehensive Loss:

	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012

Selling, general and administrative	$	346	$	197	$	705	$	222
Research and development		-		–		-		7
	$	346	$	197	$	705	$	229

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

The following table summarizes information about warrants outstanding at June 30, 2013:

	Number of shares		Weighted average exercise price
Warrants outstanding at December 31, 2012		4,038,753	$	3.68
Issued		–		–
Exercised		(1,022,946)		3.59
Expired		–		–
Warrants outstanding at June 30, 2013		3,015,807	$	3.71

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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