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Major Customers and Concentration of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2018

Risks and Uncertainties [Abstract]

Schedule of major customers and concentration risks

Customer	2018 Revenue				% of Total Revenue			2017 Revenue				% of Total Revenue			2016 Revenue				% of Total Revenue
ApolloBio	$	23,000,000			75	%		$	—			—	%		$	—			—	%
AstraZeneca	6,850,424				23			22,269,773				53			1,518,639				4
DARPA	—				—			9,983,927				24			26,602,183				75
Roche	—				—			6,107,254				14			4,917,929				14
GeneOne (affiliated entity)	342,386				1			551,208				1			1,188,432				4
All other	289,087				1			3,307,924				8			1,141,178				3
Total revenue	$	30,481,897			100	%		$	42,220,086			100	%		$	35,368,361			100	%

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- Definition

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

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