Acquisitions of Ownership Interests in Partner Companies and Funds	3 Months Ended
Mar. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Acquisitions of Ownership Interests in Partner Companies	Acquisitions of Ownership Interests in Partner Companies In March and January 2017, the Company deployed an aggregate of $2.0 million in 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 February 2017, the Company funded $0.5 million of a convertible loan 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 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 community 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 March 31, 2017. The Company accounted for its interest in Aventura under the equity method. In January 2017, the Company funded $1.0 million of a convertible bridge loan 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.

Acquisitions of Ownership Interests in Partner Companies

In March and January 2017, the Company deployed an aggregate of $2.0 million in 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 February 2017, the Company funded $0.5 million of a convertible loan 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 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 community 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 March 31, 2017. The Company accounted for its interest in Aventura under the equity method.

In January 2017, the Company funded $1.0 million of a convertible bridge loan 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.