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Stockholders' equity - Recent Issuances (Details) - USD ($)	1 Months Ended	6 Months Ended
	Jan. 31, 2018	Jun. 30, 2018
Warrant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued (in shares)		4,246,153
Exercise of warrants for common stock (in shares)		249,824
January 2018 Public Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from warrant exercises		$ 811,928
Proceeds from public offering	$ 10,600,000
Exercise of warrants for common stock (in shares)		249,824
January 2018 Public Offering | Warrant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued (in shares)	4,246,153
Common Stock | January 2018 Public Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued (in shares)	3,692,307
Intrexon Corporation | January 2018 Public Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from public offering	$ 5,000,000
Intrexon Corporation | January 2018 Public Offering | Warrant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued (in shares)	1,538,461
Intrexon Corporation | Common Stock | January 2018 Public Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued (in shares)	1,538,461

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