Acquisitions of Ownership Interests in Partner Companies and Funds	6 Months Ended
Jun. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]
Acquisitions of Ownership Interests in Partner Companies	Acquisitions of Ownership Interests in Partner Companies In June 2017, the Company funded $1.8 million of a convertible bridge loan to Good Start Genetics, Inc. The Company had previously deployed an aggregate of $17.2 million in Good Start Genetics. Good Start Genetics is an information solutions company delivering genetics offerings to growing families, including advanced clinical sequencing and individualized actionable information to promote successful pregnancies. The Company accounts for its interest in Good Start Genetics under the equity method. In June 2017, the Company funded an aggregate of $0.6 million of convertible bridge loans to Cask Data, Inc. The Company had previously deployed an aggregate of $11.0 million in Cask Data. Cask Data accelerates development and deployment of production Hadoop applications. The Company accounts for its interest in Cask Data under the equity method. In June and April 2017, the Company funded an aggregate of $3.0 million of a convertible bridge loan to Sonobi, Inc. The Company had previously deployed $5.4 million in Sonobi. 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 June and February 2017, the Company funded an aggregate of $1.0 million of convertible loans to NovaSom, Inc. The Company had previously deployed an aggregate of $22.0 million in NovaSom. NovaSom is a medical device company focused on obstructive sleep apnea, specifically home testing with its FDA-cleared wireless device called AccuSom^® Home Sleep Test. The Company accounts for its interest in NovaSom under the equity method. In June and January 2017, the Company funded an aggregate of $2.0 million of convertible bridge loans to WebLinc, Inc. The Company had previously deployed an aggregate of $12.0 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 May 2017, the Company deployed $2.1 million into Trice Medical, Inc. The Company had previously deployed an aggregate of $8.0 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 April 2017, the Company deployed $1.5 million into Aktana, Inc. The Company had previously deployed an aggregate of $8.2 million in Aktana. Aktana leverages big data and machine learning to enable pharmaceutical brands to dynamically optimize their strategy and enhance sales execution. The Company accounts for its interest in Aktana under the equity method. In March and January 2017, the Company deployed an aggregate of $2.0 million into CloudMine, Inc. The Company had previously deployed an aggregate of $5.5 million in CloudMine. 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 March and February 2017, the Company funded an aggregate of $4.0 million of convertible bridge loans to InfoBionic, Inc. The Company had previously deployed an aggregate of $14.5 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. In March 2017, the Company funded $0.2 million of a bridge loan to Lumesis, Inc. The Company had previously deployed an aggregate of $6.2 million in Lumesis. Lumesis is a financial technology company focused on providing business efficiency, regulatory and data solutions to the municipal bond marketplace. The Company accounts for its interest in Lumesis under the equity method. In January 2017, the Company deployed $2.4 million into Full Measure Education, Inc. The Company had previously deployed an aggregate of $8.6 million in Full Measure. Full Measure designs next-generation, mobile-first technologies for colleges throughout the United States. The Company accounts for its interest in Full Measure under the equity method. In January 2017, the Company funded $0.3 million of a convertible bridge loan to Aventura, Inc. to fund wind-down activities. The Company had previously deployed an aggregate of $6.2 million in Aventura. The adjusted carrying value of the Company's interest in Aventura was $0.0 million at June 30, 2017. The Company accounted for its interest in Aventura under the equity method.

Acquisitions of Ownership Interests in Partner Companies

In June 2017, the Company funded $1.8 million of a convertible bridge loan to Good Start Genetics, Inc. The Company had previously deployed an aggregate of $17.2 million in Good Start Genetics. Good Start Genetics is an information solutions company delivering genetics offerings to growing families, including advanced clinical sequencing and individualized actionable information to promote successful pregnancies. The Company accounts for its interest in Good Start Genetics under the equity method.

In June 2017, the Company funded an aggregate of $0.6 million of convertible bridge loans to Cask Data, Inc. The Company had previously deployed an aggregate of $11.0 million in Cask Data. Cask Data accelerates development and deployment of production Hadoop applications. The Company accounts for its interest in Cask Data under the equity method.

In June and April 2017, the Company funded an aggregate of $3.0 million of a convertible bridge loan to Sonobi, Inc. The Company had previously deployed $5.4 million in Sonobi. 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 June and February 2017, the Company funded an aggregate of $1.0 million of convertible loans to NovaSom, Inc. The Company had previously deployed an aggregate of $22.0 million in NovaSom. NovaSom is a medical device company focused on obstructive sleep apnea, specifically home testing with its FDA-cleared wireless device called AccuSom^® Home Sleep Test. The Company accounts for its interest in NovaSom under the equity method.

In June and January 2017, the Company funded an aggregate of $2.0 million of convertible bridge loans to WebLinc, Inc. The Company had previously deployed an aggregate of $12.0 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 May 2017, the Company deployed $2.1 million into Trice Medical, Inc. The Company had previously deployed an aggregate of $8.0 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 April 2017, the Company deployed $1.5 million into Aktana, Inc. The Company had previously deployed an aggregate of $8.2 million in Aktana. Aktana leverages big data and machine learning to enable pharmaceutical brands to dynamically optimize their strategy and enhance sales execution. The Company accounts for its interest in Aktana under the equity method.

In March and January 2017, the Company deployed an aggregate of $2.0 million into CloudMine, Inc. The Company had previously deployed an aggregate of $5.5 million in CloudMine. 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 March and February 2017, the Company funded an aggregate of $4.0 million of convertible bridge loans to InfoBionic, Inc. The Company had previously deployed an aggregate of $14.5 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.

In March 2017, the Company funded $0.2 million of a bridge loan to Lumesis, Inc. The Company had previously deployed an aggregate of $6.2 million in Lumesis. Lumesis is a financial technology company focused on providing business efficiency, regulatory and data solutions to the municipal bond marketplace. The Company accounts for its interest in Lumesis under the equity method.

In January 2017, the Company deployed $2.4 million into Full Measure Education, Inc. The Company had previously deployed an aggregate of $8.6 million in Full Measure. Full Measure designs next-generation, mobile-first technologies for colleges throughout the United States. The Company accounts for its interest in Full Measure under the equity method.

In January 2017, the Company funded $0.3 million of a convertible bridge loan to Aventura, Inc. to fund wind-down activities. The Company had previously deployed an aggregate of $6.2 million in Aventura. The adjusted carrying value of the Company's interest in Aventura was $0.0 million at June 30, 2017. The Company accounted for its interest in Aventura under the equity method.