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Fair value of financial instruments and marketable securities - (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of financial assets and liabilities that are required to be measured at fair value on a recurring basis | The following represents the fair value using the hierarchy described in Note 2 for the Company’s financial assets and liabilities that are required to be measured at fair value on a recurring basis as of December 31, 2021 and 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ |  | ​ | ​ |  | Quoted prices |  | Significant |  | ​ | ​
​ | ​ | ​ | ​ |  | in active |  | other |  | Significant
​ | ​ | ​ | ​ |  | markets for |  | observable |  | unobservable
​ | ​ | ​ | ​ |  | identical assets |  | inputs |  | inputs
​ |  | Total |  | (level 1) |  | (level 2) |  | (level 3)
Marketable securities - available for sale | ​ | $ | 376,685 | ​ | $ | — | ​ | $ | 376,685 | ​ | $ | —
Marketable securities - equity investments | ​ | $ | 206,973 | ​ | $ | 206,973 | ​ | $ | — | ​ | $ | —
ClearPoint Equity Investments | ​ | $ | 14,525 | ​ | $ | 14,525 | ​ | $ | — | ​ | $ | —
ClearPoint convertible debt security | ​ | $ | 20,971 | ​ | $ | — | ​ | $ | 20,971 | ​ | $ | —
Contingent consideration payable- development and regulatory milestones | ​ | $ | 139,300 | ​ | $ | — | ​ | $ | — | ​ | $ | 139,300
Contingent consideration payable- net sales milestones and royalties | ​ | $ | 100,600 | ​ | $ | — | ​ | $ | — | ​ | $ | 100,600
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | ​ | ​ |  | Quoted prices |  | Significant |  | ​ | ​
​ | ​ | ​ | ​ |  | in active |  | other |  | Significant
​ | ​ | ​ | ​ |  | markets for |  | observable |  | unobservable
​ | ​ | ​ | ​ |  | identical assets |  | inputs |  | inputs
​ |  | Total |  | (level 1) |  | (level 2) |  | (level 3)
Marketable securities - available for sale | ​ | $ | 894,838 | ​ | $ | — | ​ | $ | 894,838 | ​ | $ | —
ClearPoint Equity Investments | ​ | $ | 20,503 | ​ | $ | 20,503 | ​ | $ | — | ​ | $ | —
ClearPoint convertible debt security | ​ | $ | 29,252 | ​ | $ | — | ​ | $ | 29,252 | ​ | $ | —
Contingent consideration payable- development and regulatory milestones | ​ | $ | 139,200 | ​ | $ | — | ​ | $ | — | ​ | $ | 139,200
Contingent consideration payable- net sales milestones and royalties | ​ | $ | 101,200 | ​ | $ | — | ​ | $ | — | ​ | $ | 101,200
Summary of marketable securities accounted for as available-for-sale debt securities | The following is a summary of marketable securities accounted for as available for sale debt securities at December 31, 2021 and 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ |  | Amortized |  | Gross Unrealized | ​ | ​ | ​
​ |  | Cost |  | Gains |  | Losses |  | Fair Value
Commercial paper | ​ | $ | 75,275 | ​ | ​ | 5 | ​ | ​ | (1) | ​ | ​ | 75,279
Corporate debt securities | ​ |  | 268,246 | ​ | ​ | 81 | ​ | ​ | (644) | ​ | ​ | 267,683
Asset-backed securities | ​ |  | 15,287 | ​ | ​ | 16 | ​ | ​ | (5) | ​ | ​ | 15,298
Government obligations | ​ | ​ | 18,479 | ​ | ​ | 5 | ​ | ​ | (59) | ​ | ​ | 18,425
Total | ​ | $ | 377,287 | ​ | $ | 107 | ​ | $ | (709) | ​ | $ | 376,685
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Amortized |  | Gross Unrealized | ​ | ​ | ​
​ |  | Cost |  | Gains |  | Losses |  | Fair Value
Commercial paper | ​ | $ | 276,855 | ​ | $ | 19 | ​ | $ | (37) | ​ | $ | 276,837
Corporate debt securities | ​ |  | 474,030 | ​ |  | 1,658 | ​ |  | (29) | ​ |  | 475,659
Asset-backed securities | ​ |  | 28,681 | ​ |  | 210 | ​ |  | (3) | ​ |  | 28,888
Government obligations | ​ | ​ | 113,372 | ​ | ​ | 88 | ​ | ​ | (6) | ​ | ​ | 113,454
Total | ​ | $ | 892,938 | ​ | $ | 1,975 | ​ | $ | (75) | ​ | $ | 894,838
Summary of unrealized losses and fair values of available-for-sale debt securities in a continuous unrealized loss position | The unrealized losses and fair values of available for sale debt securities that have been in an unrealized loss position for a period of less than and greater than or equal to 12 months as of December 31, 2021 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ |  | Securities in an unrealized loss |  | Securities in an unrealized loss |  | ​ | ​ | ​ | ​ | ​
​ |  | position less than 12 months |  | position greater than or equal to 12 months | ​ | Total
​ |  | Unrealized losses |  | Fair Value |  | Unrealized losses |  | Fair Value |  | Unrealized losses |  | Fair Value
Commercial paper | ​ | $ | (1) | ​ | ​ | 12,992 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | 12,992
Corporate debt securities | ​ | ​ | (608) | ​ | ​ | 217,540 | ​ | ​ | (36) | ​ | ​ | 4,985 | ​ | ​ | (644) | ​ | ​ | 222,525
Asset-backed securities | ​ |  | (5) | ​ | ​ | 10,786 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (5) | ​ | ​ | 10,786
Government obligations | ​ | ​ | (59) | ​ | ​ | 15,483 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (59) | ​ | ​ | 15,483
Total | ​ | $ | (673) | ​ | $ | 256,801 | ​ | $ | (36) | ​ | $ | 4,985 | ​ | $ | (709) | ​ | $ | 261,786
​ The unrealized losses and fair values of available for sale debt securities that have been in an unrealized loss position for a period of less than and greater than or equal to 12 months as of December 31, 2020 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Securities in an unrealized loss |  | Securities in an unrealized loss |  | ​ | ​ | ​ | ​ | ​
​ |  | position less than 12 months |  | position greater than or equal to 12 months | ​ | Total
​ |  | Unrealized losses |  | Fair Value |  | Unrealized losses |  | Fair Value |  | Unrealized losses |  | Fair Value
Commercial paper | ​ | $ | (37) | ​ | ​ | 129,630 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (37) | ​ | ​ | 129,630
Corporate debt securities | ​ | ​ | (29) | ​ | ​ | 102,426 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (29) | ​ | ​ | 102,426
Asset-backed securities | ​ |  | (3) | ​ |  | 1,830 | ​ |  | — | ​ |  | — | ​ |  | (3) | ​ |  | 1,830
Government obligations | ​ | ​ | (6) | ​ | ​ | 27,084 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (6) | ​ | ​ | 27,084
Total | ​ | $ | (75) | ​ | $ | 260,970 | ​ | $ | — | ​ | $ | — | ​ | $ | (75) | ​ | $ | 260,970
Schedule of marketable securities on the balance sheet | Available for sale debt securities on the balance sheet at December 31, 2021 and 2020 mature as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ |  | Less Than |  | More Than
​ |  | 12 Months |  | 12 Months
Commercial paper | ​ | $ | 75,279 | ​ | $ | —
Corporate debt securities | ​ |  | 131,606 | ​ |  | 136,077
Asset-backed securities | ​ |  | 8,724 | ​ |  | 6,574
Government obligations | ​ | ​ | 6,002 | ​ | ​ | 12,423
Total | ​ | $ | 221,611 | ​ | $ | 155,074
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Less Than |  | More Than
​ |  | 12 Months |  | 12 Months
Commercial paper | ​ | $ | 276,837 | ​ | $ | —
Corporate debt securities | ​ |  | 240,139 | ​ |  | 235,520
Asset-backed securities | ​ |  | 6,363 | ​ |  | 22,525
Government obligations | ​ | ​ | 65,524 | ​ | ​ | 47,930
Total | ​ | $ | 588,863 | ​ | $ | 305,975
Summary of changes in the fair value of the Company's Level 3 valuation for contingent consideration payable | The table presented below is a summary of changes in the fair value of the Company’s Level 3 valuation for the contingent consideration payables for the years ended December 31, 2021, and 2020:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Contingent consideration payable- | ​ | Contingent consideration payable-
​ | ​ | development and regulatory | ​ | net sales milestones and royalties
​ |  | milestones - Agilis |  | - Agilis
Beginning balance as of December 31, 2019 | ​ |  | 290,500 | ​ |  | 65,800
Additions | ​ |  | — | ​ |  | —
Change in fair value | ​ |  | (12,120) | ​ |  | 35,400
Payments | ​ | ​ | — | ​ | ​ | —
Rights Exchange settlement | ​ | ​ | (139,180) | ​ | ​ | —
Ending balance as of December 31, 2020 | ​ |  | 139,200 | ​ |  | 101,200
Additions | ​ |  | — | ​ |  | —
Change in fair value | ​ |  | 100 | ​ |  | (600)
Payments | ​ |  | — | ​ |  | —
Rights Exchange settlement | ​ | ​ | — | ​ | ​ | —
Ending balance as of December 31, 2021 | ​ | $ | 139,300 | ​ | $ | 100,600
​ The following significant unobservable inputs were used in the valuation of the contingent consideration payables for the years ended December 31, 2021 and 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ |  | Fair Value |  | Valuation Technique |  | Unobservable Input |  | Range
Contingent consideration payable- development and regulatory milestones | ​ | $139,300 |  | Probability-adjusted discounted cash flow |  | Potential development and regulatory milestones Probabilities of success Discount rates Projected years of payments | ​ | $0 - $381 million 25% - 94% 1.7% - 4.7% 2022 - 2028
Contingent considerable payable- net sales milestones and royalties | ​ | $100,600 |  | Option-pricing model with Monte Carlo simulation |  | Potential net sales milestones Probabilities of success Potential percentage of net sales for royalties Discount rate Projected years of payments | ​ | $0 - $150 million 25% - 94% 2% - 6% 11.0% 2023 - 2040
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Fair Value |  | Valuation Technique |  | Unobservable Input |  | Range
Contingent consideration payable- development and regulatory milestones | ​ | $139,200 |  | Probability-adjusted discounted cash flow |  | Potential development and regulatory milestones Probabilities of success Discount rates Projected years of payments | ​ | $0 - $381 million 25% - 94% 2.2% - 4.5% 2021 - 2028
Contingent considerable payable- net sales milestones and royalties | ​ | $101,200 |  | Option-pricing model with Monte Carlo simulation |  | Potential net sales milestones Probabilities of success Potential percentage of net sales for royalties Discount rate Projected years of payments | ​ | $0 - $150 million 25% - 94% 2% - 6% 11.5% 2022 - 2040

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- Definition Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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