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Royalty Agreements - Narrative (Details) - BioSphere APHP Royalty - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Royalty Agreements [Line Items] |  |  |
Current royalty rate | 5.00% |  |
Future royalty rate | 2.50% |  |
Royalty expense | $ 1.8 | $ 1.5 | $ 1.5

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- Definition Current Royalty Rate + References No definition available. + Details
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- Definition Future Royalty Rate + References No definition available. + Details
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- Definition [Line Items] for Royalty Agreements [Table] + References No definition available. + Details
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- Definition Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Details
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