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Property and equipment - Summary of Property and Equipment (Details) (USD $)
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3 Months Ended | 3 Months Ended | |||||||||||||
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Mar. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2014
Minimum
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Mar. 31, 2014
Maximum
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Dec. 31, 2013
Machinery and Equipment
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Dec. 31, 2012
Machinery and Equipment
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Mar. 31, 2014
Machinery and Equipment
Minimum
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Mar. 31, 2014
Machinery and Equipment
Maximum
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Dec. 31, 2013
Furniture and Fixtures
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Dec. 31, 2012
Furniture and Fixtures
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Dec. 31, 2013
Computer software
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Dec. 31, 2012
Computer software
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Dec. 31, 2013
Leasehold improvements
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Dec. 31, 2012
Leasehold improvements
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| Property, Plant and Equipment [Line Items] | |||||||||||||||
| Property and equipment, gross | $ 1,317,879 | $ 915,649 | $ 773,894 | $ 478,290 | $ 79,612 | $ 54,058 | $ 67,215 | $ 56,935 | $ 397,158 | $ 326,366 | |||||
| Less: accumulated depreciation and amortization | (679,853) | (480,037) | |||||||||||||
| Net property, plant and equipment | $ 634,560 | $ 638,026 | $ 435,612 | ||||||||||||
| Useful life - years | 3 years | 15 years | 5 years | 8 years 6 months | |||||||||||
| X | ||||||||||
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- Definition
The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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