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18. Income taxes (Details-Deferred tax assets) (USD $) | Dec. 31, 2013 | Dec. 31, 2012
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforward | $ 21,492,311 | $ 18,050,294
Amortization | (823,367) | (580,145)
Stock option compensation | 5,841,333 | 904,334
Deferred compensation | 1,563,754 | 883,794
Deferred state tax | (1,904,277) | (477,307)
Other | 105,179 | 449,209
Valuation allowance | (26,274,933) | (19,230,179)
Net deferred tax asset | $ 0 | $ 0

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