Notes and interest receivables of related parties (Details) (USD $)	Mar. 31, 2013
Notes Receivable Related Parties Current And Noncurrent Interest Rate at 1%	$ 293,233
Notes Receivable Related Parties Current And Noncurrent Interest Rate at 10%	200,000
Allowance for Doubtful Accounts on Notes Receivable Related Parties	(493,233)
Total of Notes Receivable Related Parties net	0
Accrued interest on 1% related party notes receivables	2,232
Accrued interest on 10% related party notes receivables	33,667
Allowance for Doubtful interest receivable on Notes Receivable Related Parties	(35,899)
Total accrued interest on related party notes receivables net	$ 0