Stock incentive plan and stock-based compensation (Tables)

12 Months Ended

Dec. 31, 2014

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 employee’s restricted stock as of December 31, 2014 and 2013 is presented below:

	Number of shares		Weighted average grant date fair value
Non–vested at January 1, 2013		314,667	$	5.20
Granted		6,000		3.68
Vested		(264,000)		4.56
Forfeited		(4,000)		4.62
Non–vested at December 31, 2013		52,667		4.56
Granted		147,000		1.72
Vested		(77,000)		3.77
Forfeited		(12,667)		3.68
Non–vested at December 31, 2014		110,000	$	1.42

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

The following table summarizes information about warrants outstanding at December 31, 2014:

	Number of warrants		Weighted average exercise price
Warrants outstanding at January 1, 2013		4,038,753	$	3.68
Issued		–		–
Exercised		(3,117,928)		3.75
Expired		–		–
Warrants outstanding at December 31, 2013		920,825	$	3.44
Issued		100,000		3.75
Exercised		–		–
Expired		–		–
Warrants outstanding at December 31, 2014		1,020,825	$	3.47

- 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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