Annual report pursuant to Section 13 and 15(d)

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

v3.7.0.1
Income taxes (Schedule of Deferred Tax Assets and (Liabilities)) (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets (liabilities):    
Net operating loss carry forwards $ 36,817,000 $ 35,649,000
Property and equipment 50,000 43,000
Other (22,000) 6,000
Capital loss carryforward 444,000
Research and development credit 1,103,000 1,103,000
Deferred tax asset 38,392,000 36,801,000
Valuation allowance (38,392,000) (36,801,000)
Deferred tax assets (liabilities)