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Commitments and Contingencies - (HETLIOZ) - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 194 Months Ended
--- | --- | ---
Mar. 31, 2020 | Jun. 30, 2018 | Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2020
HETLIOZ |  |  |  |  |
Percentage of future sublicense fees payable to third-party | mid-twenties |  |  |  |
HETLIOZ® |  |  |  |  |
HETLIOZ |  |  |  |  |
Acquisition of intangible assets |  | $ 25.0 |  | $ 8.0 | $ 37.5
Intangible assets capitalized |  |  | $ 25.0 |  | $ 33.0
Royalty payment period | 10 years |  |  |  |
Royalty payable percentage on net sales | 10.00% |  |  |  |

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X
- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Hetlioz [Abstract] + References No definition available. + Details
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- Definition Percentage of sublicense fees payable to third party under a contractual arrangement for use of technology or intellectual property. + References No definition available. + Details
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- Details
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