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Discontinued Operations, Assets Held for Sale - Additional Information (Detail) - Commercial Business Segment - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2015 | Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Impairment charge |  |  | $ 8,100,000 |  |  |  |  |  |
Success fee contingently due to third party |  |  | 900,000 |  |  |  |  |  |
Percent of realized future revenue |  |  |  |  |  |  | 5.00% |  |
Retention fees contingently due |  |  | $ 352,000 |  |  |  |  |  |
Retention fees contingently due (as percentage of consideration received) |  |  | 3.00% |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, General and Administrative Expense | $ 897,000 | $ 2,233,000 |  | $ 2,510,000 | $ 4,614,000 |  | $ 9,562,000 | $ 17,655,000 | $ 15,118,000
USAO NJ and DOJ | Forecast |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  |  |  |  | $ 685,000 |  |  |
Legal Expenses |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, General and Administrative Expense |  |  |  |  |  |  | 9,200,000 |  |
Abstral Rights and Zuplenz Rights |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Potential future milestone payments |  |  |  |  |  |  | $ 30,000,000 |  |

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