Acquisitions of Ownership Interests in Partner Companies and Funds	3 Months Ended
Mar. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Acquisitions of Ownership Interests in Partner Companies	Acquisitions of Ownership Interests in Partner Companies The Company deployed an aggregate of $0.4 million for additional equity interest in Clutch Holdings. The Company had previously deployed an aggregate of $16.3 million in Clutch. Clutch provides customer intelligence and personalized engagements that empower consumer-focused businesses to identify, understand and motivate each segment of their customer base. The Company accounts for its interest in Clutch Holdings under the equity method. The Company funded an additional $2.0 million of convertible bridge loans to Sonobi, Inc. The Company had previously deployed $11.4 million in Sonobi. Sonobi is an advertising technology developer that designs advertising tools and solutions for the industry's leading media, publishers, brand advertisers, media agencies, DSPs, and media technology providers. The Company accounts for its interest in Sonobi under the equity method. The Company funded an aggregate of $0.7 million of convertible loans to NovaSom, Inc. The Company had previously deployed an aggregate of $26.4 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. The Company funded an aggregate of $0.9 million of convertible bridge loans to WebLinc, Inc. The Company had previously deployed an aggregate of $15.0 million in WebLinc. WebLinc is an e-commerce platform and services 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

The Company deployed an aggregate of $0.4 million for additional equity interest in Clutch Holdings. The Company had previously deployed an aggregate of $16.3 million in Clutch. Clutch provides customer intelligence and personalized engagements that empower consumer-focused businesses to identify, understand and motivate each segment of their customer base. The Company accounts for its interest in Clutch Holdings under the equity method.

The Company funded an additional $2.0 million of convertible bridge loans to Sonobi, Inc. The Company had previously deployed $11.4 million in Sonobi. Sonobi is an advertising technology developer that designs advertising tools and solutions for the industry's leading media, publishers, brand advertisers, media agencies, DSPs, and media technology providers. The Company accounts for its interest in Sonobi under the equity method.

The Company funded an aggregate of $0.7 million of convertible loans to NovaSom, Inc. The Company had previously deployed an aggregate of $26.4 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.

The Company funded an aggregate of $0.9 million of convertible bridge loans to WebLinc, Inc. The Company had previously deployed an aggregate of $15.0 million in WebLinc. WebLinc is an e-commerce platform and services provider for fast growing online retailers. The Company accounts for its interest in WebLinc under the equity method.