Income taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Reconciliation of Federal Statutory Income Tax Provision to Company's Actual Provision

A reconciliation of federal statutory income tax provision to the Company’s actual provision for the years ended December 31, 2013 and 2012, respectively, are as follows: 

	2013			2012
Benefit at federal statutory tax rate	$	(1,647,000	)	$	(2,118,000	)
Foreign rate differential	141,330			122,076
Unbenefited operating losses	1,505,670			1,995,924
Provision for income taxes	13,450			24,550
Income tax provision	$	13,450		$	24,550

Schedule of Deferred Tax Assets

The components of net deferred tax assets recognized in the accompanying balance sheets at December 31, 2013 and 2012, respectively, are as follows:

	2013			2012
Net operating loss carryforwards	$	9,902,000		$	8,863,000
Accrued expenses and other	200,000			142,000
Stock compensation	1,014,000			745,000
Depreciation	(516,000		)	(661,000		)
	10,600,000			9,089,000
Valuation allowance	(10,600,000		)	(9,089,000		)
Net deferred tax asset	$	—		$	—