Acquisitions of Ownership Interests in Partner Companies and Funds	12 Months Ended
Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Acquisitions of Ownership Interests in Partner Companies	Acquisitions of Ownership Interests in Partner Companies In December 2015, the Company funded $2.0 million of a convertible bridge loan to CloudMine, Inc. The Company had previously acquired a 30.1% interest in CloudMine for $2.9 million in February 2015. CloudMine empowers payers, providers, and pharmaceutical organizations to mobilize patient information by building robust applications and driving actionable insights. The Company accounts for its interest in CloudMine under the equity method. In December 2015, the Company funded $0.7 million of a convertible bridge loan to Hoopla Software, Inc. The Company had previously deployed an aggregate of $3.2 million in Hoopla. Hoopla provides cloud-based software that helps sales organizations inspire and motivate sales team performance. The Company accounts for its interest in Hoopla under the equity method. In December 2015, the Company acquired a 26.3% interest in Zipnosis, Inc. for $7.0 million. Zipnosis provides health systems with a white-labeled, fully integrated virtual care platform. The Company accounts for its interest in Zipnosis under the equity method. In December 2015, the Company funded $0.6 million of a convertible bridge loan to WebLinc, Inc. The Company had previously deployed $6.0 million in WebLinc. WebLinc is a commerce platform provider for fast growing online retailers. The Company accounts for its interest in WebLinc under the equity method. In October 2015, the Company acquired a 34.2% interest in Cask Data, Inc. for $11.0 million. Cask Data accelerates the development and deployment of production Hadoop applications. The Company accounts for its interest in Cask under the equity method. During the year ended December 31, 2015, the Company funded an aggregate of $3.0 million of convertible bridge loans to AppFirst, Inc. The Company had previously deployed an aggregate of $8.6 million in AppFirst. AppFirst's patented technology provides enterprises with continuous and complete visibility into all the applications and supporting resources in their IT ecosystem, regardless of infrastructure. The Company accounts for its interest in AppFirst under the equity method. In July 2015, the Company deployed an additional $10.0 million into Apprenda, Inc. The Company had previously deployed $12.1 million in Apprenda. Apprenda is an enterprise platform-as-a-service company powering the next generation of enterprise software development in public, private and hybrid clouds. The Company accounts for its interest in Apprenda under the equity method. In July 2015, the Company deployed an additional $1.5 million into InfoBionic, Inc. The Company had previously deployed an aggregate of $8.0 million in InfoBionic. InfoBionic is an emerging digital health company focused on creating patient monitoring solutions for chronic disease management with an initial market focus on cardiac arrhythmias. The Company accounts for its interest in InfoBionic under the equity method. During the six months ended June 30, 2015, the Company funded an aggregate of $2.8 million of convertible bridge loans to Quantia, Inc. The Company had previously deployed an aggregate of $12.5 million in Quantia. The Company accounted for its interest in Quantia under the equity method. In July 2015, Quantia was acquired by Physicians Interactive. In June 2015, the Company acquired a 24.5% interest in QuanticMind, Inc., formerly InsideVault, Inc., for $7.0 million. QuanticMind is a software-as-a-service company that provides enterprise-level predictive advertising management software for paid search, social and mobile. The Company accounts for its interest in QuanticMind under the equity method. In May 2015, the Company deployed an additional $3.5 million into Pneuron Corporation. The Company had previously deployed $5.0 million in Pneuron. Pneuron enables organizations to rapidly solve business problems through a distributed approach that cuts across data, applications and processes. The Company accounts for its interest in Pneuron under the equity method. In May and February 2015, the Company deployed an aggregate of $4.8 million into Clutch Holdings, Inc. The Company had previously deployed an aggregate of $7.5 million in Clutch. Clutch provides consumer management technology that delivers customer intelligence and consumer engagement solutions to premium brands. The Company accounts for its interest in Clutch under the equity method. In May 2015, the Company acquired a 22.6% interest in Sonobi, Inc. for $5.4 million. Sonobi is an advertising technology developer that creates data-driven tools and solutions to meet the evolving needs of demand- and sell-side organizations within the digital media marketplace. The Company accounts for its interest in Sonobi under the equity method. In April and March 2015, the Company funded an aggregate $1.0 million convertible bridge loan to AdvantEdge Healthcare Solutions, Inc. The Company had previously deployed an aggregate of $15.3 million in AdvantEdge. AdvantEdge is a technology-enabled provider of healthcare revenue cycle and business management solutions that improve decision-making, maximize financial performance, streamline operations and mitigate compliance risks for healthcare providers. The Company accounts for its interest in AdvantEdge under the equity method. In April 2015, the Company acquired a 31.5% interest in meQuilibrium for $6.5 million. meQuilibrium is a digital coaching platform that delivers clinically validated and highly personalized resilience solutions to employers, health plans, wellness providers, and consumers increasing engagement, productivity and performance, as well as improving outcomes in managing stress, health and well-being. The Company accounts for its interest in meQuilibrium under the equity method. In March 2015, the Company funded $4.0 million of a convertible bridge loan to Spongecell, Inc. The Company had previously deployed $10.0 million in Spongecell. Spongecell is a creative technology company that allows brand advertisers to create personal connections on a global scale. The Company accounts for its interest in Spongecell under the equity method. In March 2015, the Company deployed an additional $0.3 million into Dabo Health, Inc. The Company had previously deployed $2.0 million in Dabo Health. The Company impaired all of the carrying value of Dabo Health in the first quarter of 2015. The Company accounted for its interest in Dabo Health under the cost method. In January 2015, the Company acquired a 19.9% interest in Aventura, Inc. for $6.0 million. Aventura provides awareness computing for the healthcare industry. The Company accounts for its interest in Aventura under the equity method. In January 2015, the Company acquired a 25.4% interest in Full Measure Education, Inc. for $4.0 million. Full Measure is a technology company dedicated to the higher education industry. The Company accounts for its interest in Full Measure under the equity method. In January 2015, the Company deployed an additional $1.1 million into Trice Medical, Inc. The Company had previously deployed an aggregate of $5.0 million in Trice Medical. Trice Medical is a diagnostics company focused on micro invasive technologies. The Company accounts for its interest in Trice Medical under the equity method. In August 2014, the Company acquired a 24.6% interest in Propeller Health, Inc. for $9.0 million. Propeller Health provides digital solutions to measurably improve respiratory health. The Company accounts for its interest in Propeller Health under the equity method. In August 2014, the Company acquired a 24.8% interest in Transactis, Inc. for $9.5 million. Transactis provides electronic billing and payment solutions. The Company accounts for its interest in Transactis under the equity method. In June 2014, the Company acquired a 27.0% interest in Syapse, Inc. for $5.8 million. Syapse is a software company that enables healthcare providers to deploy precision medicine programs. The Company accounts for its interest in Syapse under the equity method. In June and April 2014, the Company deployed an aggregate of $5.0 million into Putney, Inc. The Company had previously deployed $10.0 million in Putney. Putney is a pet pharmaceutical company focused on developing high-quality generic prescription medicines for pets. The Company accounts for its interest in Putney under the equity method. In May and January 2014, the Company deployed an aggregate of $1.7 million into Lumesis, Inc. The Company had previously deployed an aggregate of $3.9 million in Lumesis. Lumesis is a financial technology company focused on providing business efficiency, data and regulatory solutions to the municipal bond marketplace. The Company accounts for its interest in Lumesis under the equity method. In May 2014, the Company funded $1.1 million of a convertible bridge loan to NovaSom, Inc. The Company had previously deployed $20.0 million in NovaSom. NovaSom is a medical device company that has developed an FDA-cleared wireless home sleep test for Obstructive Sleep Apnea called AccuSom^® Home Sleep Test. The Company accounts for its interest in NovaSom under the equity method. In May 2014, the Company deployed an additional $7.0 million into MediaMath, Inc. In connection with the May 2014 financing, the Company’s primary ownership interest decreased from 22.5% to 20.6%. As a result, the Company recognized an unrealized gain of $7.0 million which is reflected in Equity income (loss) in the Consolidated Statements of Operations for the year ended December 31, 2014. The Company had previously deployed an aggregate of $18.6 million in MediaMath. MediaMath is a global technology company that is leading the movement to revolutionize traditional marketing and drive transformative results for marketers through its TerminalOne Marketing Operating System™. The Company accounts for its interest in MediaMath under the equity method. In March 2014, the Company funded $0.2 million of a convertible bridge loan to Sotera Wireless, Inc. The Company previously deployed $1.3 million into Sotera Wireless and acquired additional shares from a previous investor for $1.2 million. In April 2014, the Company sold its equity and debt interests in Sotera Wireless for $4.2 million. The Company accounted for its interest in Sotera Wireless under the cost method. In September and June 2013, the Company funded an aggregate of $0.6 million of convertible bridge loans to Alverix, Inc. The Company had previously deployed an aggregate of $8.8 million in Alverix. In January 2014, the Company sold its equity and debt interests in Alverix for $15.7 million. The Company accounted for its interest in Alverix under the equity method. In August 2013, the Company deployed an additional $1.1 million in DriveFactor, Inc. The Company previously deployed an aggregate of $3.5 million in DriveFactor. In April 2015, the Company sold its interests in DriveFactor for $9.1 million. The Company accounted for its interest in DriveFactor under the equity method. In July 2013, the Company funded $1.0 million of a convertible bridge loan to Crescendo Bioscience, Inc. The Company previously had previously deployed $10.0 million in Crescendo Bioscience. In February 2014, the Company sold its interest in Crescendo Bioscience for $38.4 million. The Company accounted for its interest in Crescendo Bioscience under the cost method. During the year ended December 31, 2013, the Company funded an aggregate of $5.3 million of a convertible bridge loan to PixelOptics, Inc. The Company previously deployed an aggregate of $31.6 million in PixelOptics. The Company fully impaired its ownership interest in PixelOptics in 2013 based on PixelOptics' inability to raise additional capital to continue its operations. The Company accounted for its interest in PixelOptics under the equity method. In June 2013, the Company deployed an additional $5.3 million in Medivo, Inc. The Company had previously deployed $6.3 million in Medivo. Medivo is a healthcare data analytics company that unlocks the power of lab data to improve health. The Company accounts for its interest in Medivo under the equity method.

Acquisitions of Ownership Interests in Partner Companies

In December 2015, the Company funded $2.0 million of a convertible bridge loan to CloudMine, Inc. The Company had previously acquired a 30.1% interest in CloudMine for $2.9 million in February 2015. CloudMine empowers payers, providers, and pharmaceutical organizations to mobilize patient information by building robust applications and driving actionable insights. The Company accounts for its interest in CloudMine under the equity method.

In December 2015, the Company funded $0.7 million of a convertible bridge loan to Hoopla Software, Inc. The Company had previously deployed an aggregate of $3.2 million in Hoopla. Hoopla provides cloud-based software that helps sales organizations inspire and motivate sales team performance. The Company accounts for its interest in Hoopla under the equity method.

In December 2015, the Company acquired a 26.3% interest in Zipnosis, Inc. for $7.0 million. Zipnosis provides health systems with a white-labeled, fully integrated virtual care platform. The Company accounts for its interest in Zipnosis under the equity method.

In December 2015, the Company funded $0.6 million of a convertible bridge loan to WebLinc, Inc. The Company had previously deployed $6.0 million in WebLinc. WebLinc is a commerce platform provider for fast growing online retailers. The Company accounts for its interest in WebLinc under the equity method.

In October 2015, the Company acquired a 34.2% interest in Cask Data, Inc. for $11.0 million. Cask Data accelerates the development and deployment of production Hadoop applications. The Company accounts for its interest in Cask under the equity method.

During the year ended December 31, 2015, the Company funded an aggregate of $3.0 million of convertible bridge loans to AppFirst, Inc. The Company had previously deployed an aggregate of $8.6 million in AppFirst. AppFirst's patented technology provides enterprises with continuous and complete visibility into all the applications and supporting resources in their IT ecosystem, regardless of infrastructure. The Company accounts for its interest in AppFirst under the equity method.

In July 2015, the Company deployed an additional $10.0 million into Apprenda, Inc. The Company had previously deployed $12.1 million in Apprenda. Apprenda is an enterprise platform-as-a-service company powering the next generation of enterprise software development in public, private and hybrid clouds. The Company accounts for its interest in Apprenda under the equity method.

In July 2015, the Company deployed an additional $1.5 million into InfoBionic, Inc. The Company had previously deployed an aggregate of $8.0 million in InfoBionic. InfoBionic is an emerging digital health company focused on creating patient monitoring solutions for chronic disease management with an initial market focus on cardiac arrhythmias. The Company accounts for its interest in InfoBionic under the equity method.

During the six months ended June 30, 2015, the Company funded an aggregate of $2.8 million of convertible bridge loans to Quantia, Inc. The Company had previously deployed an aggregate of $12.5 million in Quantia. The Company accounted for its interest in Quantia under the equity method. In July 2015, Quantia was acquired by Physicians Interactive.

In June 2015, the Company acquired a 24.5% interest in QuanticMind, Inc., formerly InsideVault, Inc., for $7.0 million. QuanticMind is a software-as-a-service company that provides enterprise-level predictive advertising management software for paid search, social and mobile. The Company accounts for its interest in QuanticMind under the equity method.

In May 2015, the Company deployed an additional $3.5 million into Pneuron Corporation. The Company had previously deployed $5.0 million in Pneuron. Pneuron enables organizations to rapidly solve business problems through a distributed approach that cuts across data, applications and processes. The Company accounts for its interest in Pneuron under the equity method.

In May and February 2015, the Company deployed an aggregate of $4.8 million into Clutch Holdings, Inc. The Company had previously deployed an aggregate of $7.5 million in Clutch. Clutch provides consumer management technology that delivers customer intelligence and consumer engagement solutions to premium brands. The Company accounts for its interest in Clutch under the equity method.

In May 2015, the Company acquired a 22.6% interest in Sonobi, Inc. for $5.4 million. Sonobi is an advertising technology developer that creates data-driven tools and solutions to meet the evolving needs of demand- and sell-side organizations within the digital media marketplace. The Company accounts for its interest in Sonobi under the equity method.

In April and March 2015, the Company funded an aggregate $1.0 million convertible bridge loan to AdvantEdge Healthcare Solutions, Inc. The Company had previously deployed an aggregate of $15.3 million in AdvantEdge. AdvantEdge is a technology-enabled provider of healthcare revenue cycle and business management solutions that improve decision-making, maximize financial performance, streamline operations and mitigate compliance risks for healthcare providers. The Company accounts for its interest in AdvantEdge under the equity method.

In April 2015, the Company acquired a 31.5% interest in meQuilibrium for $6.5 million. meQuilibrium is a digital coaching platform that delivers clinically validated and highly personalized resilience solutions to employers, health plans, wellness providers, and consumers increasing engagement, productivity and performance, as well as improving outcomes in managing stress, health and well-being. The Company accounts for its interest in meQuilibrium under the equity method.

In March 2015, the Company funded $4.0 million of a convertible bridge loan to Spongecell, Inc. The Company had previously deployed $10.0 million in Spongecell. Spongecell is a creative technology company that allows brand advertisers to create personal connections on a global scale. The Company accounts for its interest in Spongecell under the equity method.

In March 2015, the Company deployed an additional $0.3 million into Dabo Health, Inc. The Company had previously deployed $2.0 million in Dabo Health. The Company impaired all of the carrying value of Dabo Health in the first quarter of 2015. The Company accounted for its interest in Dabo Health under the cost method.

In January 2015, the Company acquired a 19.9% interest in Aventura, Inc. for $6.0 million. Aventura provides awareness computing for the healthcare industry. The Company accounts for its interest in Aventura under the equity method.

In January 2015, the Company acquired a 25.4% interest in Full Measure Education, Inc. for $4.0 million. Full Measure is a technology company dedicated to the higher education industry. The Company accounts for its interest in Full Measure under the equity method.

In January 2015, the Company deployed an additional $1.1 million into Trice Medical, Inc. The Company had previously deployed an aggregate of $5.0 million in Trice Medical. Trice Medical is a diagnostics company focused on micro invasive technologies. The Company accounts for its interest in Trice Medical under the equity method.

In August 2014, the Company acquired a 24.6% interest in Propeller Health, Inc. for $9.0 million. Propeller Health provides digital solutions to measurably improve respiratory health. The Company accounts for its interest in Propeller Health under the equity method.

In August 2014, the Company acquired a 24.8% interest in Transactis, Inc. for $9.5 million. Transactis provides electronic billing and payment solutions. The Company accounts for its interest in Transactis under the equity method.

In June 2014, the Company acquired a 27.0% interest in Syapse, Inc. for $5.8 million. Syapse is a software company that enables healthcare providers to deploy precision medicine programs. The Company accounts for its interest in Syapse under the equity method.

In June and April 2014, the Company deployed an aggregate of $5.0 million into Putney, Inc. The Company had previously deployed $10.0 million in Putney. Putney is a pet pharmaceutical company focused on developing high-quality generic prescription medicines for pets. The Company accounts for its interest in Putney under the equity method.

In May and January 2014, the Company deployed an aggregate of $1.7 million into Lumesis, Inc. The Company had previously deployed an aggregate of $3.9 million in Lumesis. Lumesis is a financial technology company focused on providing business efficiency, data and regulatory solutions to the municipal bond marketplace. The Company accounts for its interest in Lumesis under the equity method.

In May 2014, the Company funded $1.1 million of a convertible bridge loan to NovaSom, Inc. The Company had previously deployed $20.0 million in NovaSom. NovaSom is a medical device company that has developed an FDA-cleared wireless home sleep test for Obstructive Sleep Apnea called AccuSom^® Home Sleep Test. The Company accounts for its interest in NovaSom under the equity method.

In May 2014, the Company deployed an additional $7.0 million into MediaMath, Inc. In connection with the May 2014 financing, the Company’s primary ownership interest decreased from 22.5% to 20.6%. As a result, the Company recognized an unrealized gain of $7.0 million which is reflected in Equity income (loss) in the Consolidated Statements of Operations for the year ended December 31, 2014. The Company had previously deployed an aggregate of $18.6 million in MediaMath. MediaMath is a global technology company that is leading the movement to revolutionize traditional marketing and drive transformative results for marketers through its TerminalOne Marketing Operating System™. The Company accounts for its interest in MediaMath under the equity method.

In March 2014, the Company funded $0.2 million of a convertible bridge loan to Sotera Wireless, Inc. The Company previously deployed $1.3 million into Sotera Wireless and acquired additional shares from a previous investor for $1.2 million. In April 2014, the Company sold its equity and debt interests in Sotera Wireless for $4.2 million. The Company accounted for its interest in Sotera Wireless under the cost method.

In September and June 2013, the Company funded an aggregate of $0.6 million of convertible bridge loans to Alverix, Inc. The Company had previously deployed an aggregate of $8.8 million in Alverix. In January 2014, the Company sold its equity and debt interests in Alverix for $15.7 million. The Company accounted for its interest in Alverix under the equity method.

In August 2013, the Company deployed an additional $1.1 million in DriveFactor, Inc. The Company previously deployed an aggregate of $3.5 million in DriveFactor. In April 2015, the Company sold its interests in DriveFactor for $9.1 million. The Company accounted for its interest in DriveFactor under the equity method.

In July 2013, the Company funded $1.0 million of a convertible bridge loan to Crescendo Bioscience, Inc. The Company previously had previously deployed $10.0 million in Crescendo Bioscience. In February 2014, the Company sold its interest in Crescendo Bioscience for $38.4 million. The Company accounted for its interest in Crescendo Bioscience under the cost method.

During the year ended December 31, 2013, the Company funded an aggregate of $5.3 million of a convertible bridge loan to PixelOptics, Inc. The Company previously deployed an aggregate of $31.6 million in PixelOptics. The Company fully impaired its ownership interest in PixelOptics in 2013 based on PixelOptics' inability to raise additional capital to continue its operations. The Company accounted for its interest in PixelOptics under the equity method.

In June 2013, the Company deployed an additional $5.3 million in Medivo, Inc. The Company had previously deployed $6.3 million in Medivo. Medivo is a healthcare data analytics company that unlocks the power of lab data to improve health. The Company accounts for its interest in Medivo under the equity method.