Annual report pursuant to Section 13 and 15(d)

Income taxes (Schedule of Deferred Tax Assets and (Liabilities)) (Details)

v2.4.0.8
Income taxes (Schedule of Deferred Tax Assets and (Liabilities)) (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Income taxes [Abstract]    
Net operating loss carry forwards $ 29,494,000 $ 25,100,000
Property and equipment 37,000 32,000
Patents and other intangible assets 14,000 17,000
Other (12,000)   
Difference revenue (39,000) 551,000
Research and development credit 991,000 753,000
Deferred tax asset 30,485,000 26,453,000
Valuation allowance (30,485,000) (26,453,000)
Deferred tax assets (liabilities)