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v3.19.1

Summary of Principal Payment Settlement in Cash or Exchange for Issuance of Shares (Detail) - Deerfield $ in Millions | 3 Months Ended
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Mar. 31, 2019 USD ($)
Notes Due and Payable on July, 2016 | 2019 notes |
Debt Instrument [Line Items] |
Cash repayment of senior notes under exchange agreement | $ 5.0
Notes Due and Payable on April, 2017 | 2019 notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 5.0
Notes Due and Payable on April, 2017 | Tranche B notes |
Debt Instrument [Line Items] |
Cash repayment of senior notes under exchange agreement | 4.0
Conversion of notes to common shares, value | 1.0
Notes Due and Payable on June, 2017 | 2019 notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 5.0
Notes Due and Payable on November, 2017 | 2019 notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 5.6
Notes Due and Payable on January, 2018 | 2019 notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 3.2
Notes Due and Payable on March, 2018 | 2019 notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 1.3
Notes Due and Payable on March, 2018 | Tranche B notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 5.0
Notes Due and Payable on June, 2018 | 2019 notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 3.0
Notes Due and Payable on June, 2018 | Tranche B notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 3.0
Notes Due and Payable on July, 2018 | 2019 notes |
Debt Instrument [Line Items] |
Cash repayment of senior notes under exchange agreement | 2.0
Conversion of notes to common shares, value | 10.0
Notes Due and Payable on July, 2018 | Tranche B notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 2.0
Notes Due and Payable on September, 2018 | 2019 notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 8.0
Notes Due and Payable on September, 2018 | Tranche B notes |
Debt Instrument [Line Items] |
Conversion of notes to common shares, value | 2.5
Notes Due and Payable on October, 2018 | 2019 notes |
Debt Instrument [Line Items] |
Cash repayment of senior notes under exchange agreement | $ 3.0

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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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