Restructuring - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended |
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Dec. 31, 2012
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Dec. 31, 2012
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Restructuring Cost and Reserve [Line Items] | ||
Restructuring and impairment charges | $ 2,500,000 | $ 1,604,256 |
In-process research & development
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Restructuring Cost and Reserve [Line Items] | ||
Restructuring and impairment charges | 1,200,000 | |
Noncash disposal of property and equipment
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Restructuring Cost and Reserve [Line Items] | ||
Restructuring and impairment charges | 300,000 | |
Disposal of inventory
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Restructuring Cost and Reserve [Line Items] | ||
Restructuring and impairment charges | 100,000 | |
Employee termination costs
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Restructuring Cost and Reserve [Line Items] | ||
Restructuring and impairment charges | $ 900,000 |