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Supplemental Cash Flow Information	12 Months Ended
Supplemental Cash Flow Information	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information During the years ended December 31, 2016 and 2015, the Company converted $3.9 million and $1.0 million, respectively, of advances to partner companies into ownership interests in partner companies. Cash paid for interest in each of the years ended December 31, 2016, 2015 and 2014 was $2.9 million. Cash paid for taxes in each of the years ended December 31, 2016, 2015 and 2014 was $0.0 million.