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Short-term Notes Payable - Additional Information (Detail) (USD $)
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9 Months Ended | 9 Months Ended | ||||
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Sep. 30, 2013
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Dec. 31, 2012
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Sep. 30, 2013
Product Liability Insurance [Member]
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Mar. 08, 2013
Product Liability Insurance [Member]
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Sep. 30, 2013
Directors' and Officers' Liability Insurance Financing [Member]
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Jun. 20, 2013
Directors' and Officers' Liability Insurance Financing [Member]
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| Short-term Debt [Line Items] | ||||||
| Short term notes payable for financing insurance policies | $ 108,220 | $ 47,977 | ||||
| Short-term note payable | $ 50,037 | $ 106,994 | ||||
| Interest rate on short-term note | 6.57% | 4.64% | ||||
| Short-term notes payable amortization period | 10 months | 11 months | ||||
| Final payment date of short-term note payable | Jan. 10, 2014 | Jun. 24, 2014 |