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Investments in Affiliated Entities (Details) - shares	Dec. 31, 2018	Dec. 31, 2017
GeneOne Life Sciences
Related Party Transaction [Line Items]
Number of shares owned (shares)	1,644,155
Percentage of ownership	7.80%	7.80%
GeneOne Life Sciences | Common stock
Related Party Transaction [Line Items]
Number of shares owned (shares)	1,644,155	1,644,155
Plumbline Life Sciences
Related Party Transaction [Line Items]
Percentage of ownership	15.10%	16.40%
Plumbline Life Sciences | Common stock
Related Party Transaction [Line Items]
Number of shares owned (shares)	395,758	395,758

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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- Definition

Balance held at close of period in number of shares.

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