Quarterly report pursuant to Section 13 or 15(d)

Accumulated other comprehensive income (loss) (Details)

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Accumulated other comprehensive income (loss) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Marketable securities        
Beginning balance $ 0   $ (12,563)  
Gains (losses) on available for sale securities $ 0      
Less: Tax (tax benefit)   $ 0    
Net gains (losses) on available for sale securities     0  
(Gains) Losses reclassified from accumulated other comprehensive income to net income     12,563  
Less: Tax (tax benefit)     0  
Net gains (losses) reclassified from accumulated other comprehensive income to net income     12,563  
Other comprehensive income (loss), net of tax     $ 12,563  
Ending balance   $ 0   $ 0