Annual report pursuant to Section 13 and 15(d)

Property and equipment - Summary of Property and Equipment (Details)

v2.4.0.6
Property and equipment - Summary of Property and Equipment (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 915,649 $ 695,938
Less: accumulated depreciation and amortization (480,037) (310,159)
Net property, plant and equipment 435,612 385,779
Depreciation and Amortization 169,878 134,295
Minimum
    
Property, Plant and Equipment [Line Items]    
Useful life - years 3 years  
Maximum
    
Property, Plant and Equipment [Line Items]    
Useful life - years 7 years  
Machinery and Equipment
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 478,290 355,985
Machinery and Equipment | Minimum
    
Property, Plant and Equipment [Line Items]    
Useful life - years 5 years  
Machinery and Equipment | Maximum
    
Property, Plant and Equipment [Line Items]    
Useful life - years 7 years  
Furniture and Fixtures
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 54,058 48,157
Useful life - years 5 years  
Computer software
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 56,935 46,355
Computer software | Minimum
    
Property, Plant and Equipment [Line Items]    
Useful life - years 3 years  
Computer software | Maximum
    
Property, Plant and Equipment [Line Items]    
Useful life - years 5 years  
Leasehold improvements
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 326,366 [1] $ 245,441 [1]
[1] Lesser of estimated useful life of asset or lease term