Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Additional Information (Detail)

Shareholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended				3 Months Ended	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Jan. 13, 2014	Nov. 27, 2013	Oct. 18, 2013	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 20, 2013	May 30, 2014	May 30, 2013	Jan. 31, 2013	Dec. 18, 2013	Sep. 30, 2013
Class of Stock [Line Items]
Gross proceeds from private placement of common stock							$ 13,804,996
Recorded non cash expenses					6,000,000		6,000,000
Shares awarded under plan			502,654	422,359
Shares withheld to cover tax payments			113,636	84,287		0	197,923
Capital raise threshold			12,000,000
Gross proceeds from issuance of common stock							14,900,000	13,000,000
Issued warrants, exercised		210,000ogen_ClassOfWarrantOrRightExercised
Shares of common stock issued upon exercise of warrants		135,000
Warrants outstanding	2,532,094					2,532,094
Number of Stock options outstanding	820,865					820,865	633,840	660,423
Total number of outstanding common shares	39,531,903
Underwriter [Member]
Class of Stock [Line Items]
Company's common stock shares sold									4,400,000
Common Stock, Public offering price									$ 2.50
Gross proceeds from private placement of common stock									9,904,996
Gross proceeds from issuance of common stock									11,000,000
Non Employee Director [Member]
Class of Stock [Line Items]
Shares awarded under plan			191,985	165,925
Executive Officer [Member]
Class of Stock [Line Items]
Shares awarded under plan			310,669	256,434
2012 Equity Incentive Plan [Member] \| Non Employee Director [Member]
Class of Stock [Line Items]
Common stock, grant award of fully vested shares										10,000
Recognized expenses, to award of shares to non employee directors										102,500
Lantibiotic Exclusive Channel Collaboration (ECC) [Member]
Class of Stock [Line Items]
Common stock issued						4,392,425
Class of Warrant Three [Member]
Class of Stock [Line Items]
Class of warrants or rights expired											127,888
Warrants exercisable price per share											$ 26.00
Class of Warrant Four [Member]
Class of Stock [Line Items]
Class of warrants or rights expired											161,000
Warrants exercisable price per share											$ 15.00
Griffin Securities Inc. [Member]
Class of Stock [Line Items]
Issued warrants, exercised												200,000
Shares of common stock issued upon exercise of warrants												106,250
Intrexon [Member] \| Lantibiotic Exclusive Channel Collaboration (ECC) [Member]
Class of Stock [Line Items]
Company's common stock shares sold														1,300,000
Common Stock, Public offering price					$ 3.00									$ 3.00
Gross proceeds from private placement of common stock														3,900,000
Up-front technology access fee														6,000,000
Common stock issued							1,348,000
Convertible promissory note issued to pay technology access fee	1,956,000					1,956,000
Maturity date of convertible note						Dec. 31, 2013
Common stock issued													698,241
Conversion price of convertible note payable													$ 2.82