I looked back at all the annual fins back through to 2010 and I haven't located any line item for income taxes paid, so not sure his fins include them at all. 2010 was his most detailed set, but no taxes.
Here are numbers I see:
Year_______Sales________Net Gain_____Assets as of 12/31 2010____$1,496,770______$232,352_________$788,516 2011____$2,374,224______$657,586_________$844,055 2012____$4,555,617____$1,779,527_________$741,538 2013Q1_$1,599,873______$507,865_________$928,107
Of the $928K, $134K was from stock issuance, thus assets only rose $50K from the net gain of $508K. Seems like the numbers are wrong somewhere here.
Conclusion: Assets have increased since Jan 1, 2011 to present by $139,591. Net Gains for the same period (2011 to present) are $2,944,978. Even if $1M in taxes were left out, an asset gain of $134K just seems impossible from an after tax gain of $1.9M.