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15. Commitments and contingencies (Details) (USD $)
Mar. 31, 2013
Contractual Obligation  
Total $ 8,860,481
2013 8,152,575
2014 464,958
2015 242,948
2016   
Notes payable
  
Contractual Obligation  
Total 4,224,103
2013 4,224,103
2014   
2015   
2016   
Rent obligations
  
Contractual Obligation  
Total 1,260,645
2013 677,738
2014 339,958
2015 242,948
2016   
Deferred salary
  
Contractual Obligation  
Total 1,334,488
2013 1,334,448
2014   
2015   
2016   
Accrued interest
  
Contractual Obligation  
Total 268,206
2013 268,206
2014   
2015   
2016   
Accrued dividends on preferred stock
  
Contractual Obligation  
Total 802,991
2013 802,991
2014   
2015   
2016   
Consulting agreement
  
Contractual Obligation  
Total 375,000
2013 250,000
2014 125,000
2015   
2016   
Employee contracts: salary
  
Contractual Obligation  
Total 363,750
2013 363,750
2014   
2015   
2016   
Employee contracts: other
  
Contractual Obligation  
Total 231,299
2013 231,299
2014   
2015   
2016