Warrants, Other Liability and Net Sales Distribution Payment Liability - Additional Information (Detail) - USD ($)
$ in Thousands |
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12 Months Ended |
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Dec. 03, 2014 |
Oct. 14, 2014 |
Dec. 18, 2013 |
Jul. 20, 2012 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Mar. 31, 2015 |
Dec. 08, 2014 |
Jul. 09, 2014 |
| Class of Warrant or Right [Line Items] |
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| Common stock issued upon common stock warrants exercisable |
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47,828
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47,898
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| Net exercise of warrants, shares |
44,531
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161,977
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156,138
|
156,138
|
7,398
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44,531
|
6,566
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| Percentage of net sales in net sales distribution payment |
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2.00%
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| Percentage of net sales of entitled distribution payment under new royalty agreement |
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3.00%
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| Amount payable for each net sales percentage point redeemed |
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$ 10,000
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| Extinguishment of Net Sales Distribution Payment Liability redemption provision |
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$ 15,803
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| New Royalty Agreement [Member] |
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| Class of Warrant or Right [Line Items] |
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| Percentage of net sales of entitled distribution payment under new royalty agreement |
3.00%
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| Extinguishment of Net Sales Distribution Payment Liability redemption provision |
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$ 15,803
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| Series A Preferred Stock [Member] |
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| Class of Warrant or Right [Line Items] |
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| Net exercise of warrants, shares |
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161,977
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| Series A Preferred Stock [Member] | New Royalty Agreement [Member] |
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| Class of Warrant or Right [Line Items] |
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| Percentage of net sales in net sales distribution payment |
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2.00%
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| Percentage of net sales of entitled distribution payment under new royalty agreement |
|
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3.00%
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| Amount payable for each net sales percentage point redeemed |
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$ 10,000
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