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Investments in Affiliated Entities	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Investments in Affiliated Entities	Investments in Affiliated Entities The Company held 1,644,155 common shares, representing a 7.8% and 10.2% ownership interest in GeneOne as of December 31, 2017 and 2016, respectively, and 395,758 common shares, representing a 16.4% ownership interest in PLS as of each of December 31, 2017 and 2016. The Company's investment in GeneOne is measured at fair value on a recurring basis. The Company elected the fair value option in conjunction with the investment in GeneOne at the inception of the investment; therefore, changes in the fair value of the investment are reflected as other income (expense) in the consolidated statements of operations.  The fair market value of the Company’s interest in GeneOne was determined using the closing price of GeneOne's shares of common stock as listed on the Korean Stock Exchange as of December 31, 2017 and 2016. The Company accounts for its investment in PLS as an available-for sale security by which the fair value was determined using the closing price of the common shares on the Korea New Exchange (KONEX) Market. The Company did not elect the fair value option for the investment in PLS at the inception of the investment, but rather recorded the investment under the equity method until its ownership interest dropped below 20% in June 2015 and accordingly began recording the investment under the cost method using the carryover basis from the equity method of zero. Once shares of PLS began trading on the KONEX, the Company classified the investment as available-for-sale and began recording the investment at fair value with changes in fair value reflected in other comprehensive income (loss).

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- Definition

The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-URI http://asc.fasb.org/topic&trid=2196965

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- References

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