19. Income taxes (Details) (USD $)	Dec. 31, 2012
Income Taxes Details
Net operating loss carryforward	$ 18,050,294
Amortization	(580,145)
Stock option compensation	904,334
Deferred compensation	883,794
Deferred state tax	(477,307)
Other	449,209
Valuation allowance	(19,230,179)
Net deferred tax asset

Amortization

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- Definition

Stock option compensation

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No definition available.

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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from state taxes.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.

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