Debt Financing (Details) In Thousands, except Share data, unless otherwise specified	3 Months Ended						3 Months Ended					3 Months Ended							3 Months Ended
	Mar. 31, 2013 USD ($)	Mar. 31, 2013 EUR (€)	Dec. 31, 2012 EUR (€)	Sep. 30, 2010 USD ($)	Apr. 01, 2009 USD ($)	Mar. 31, 2009	Mar. 31, 2013 Convertible Debt [Member]	Mar. 31, 2013 Convertible Debt [Member]	Mar. 31, 2013 Payment One [Member] EUR (€)	Mar. 31, 2013 Payment Two [Member] EUR (€)	Mar. 31, 2013 Norwood Secured Loan [Member] EUR (€)	Mar. 31, 2013 Norwood Secured Loan [Member] 04/03/2009 [Member] EUR (€)		Mar. 31, 2013 Norwood Secured Loan [Member] Payment One [Member] EUR (€)	Mar. 31, 2013 Norwood Secured Loan [Member] Payment Two [Member] EUR (€)	Mar. 31, 2013 Norwood Secured Loan [Member] Payment Three [Member] EUR (€)	Mar. 31, 2013 Norwood Secured Loan [Member] Payment Four [Member] EUR (€)	Mar. 31, 2013 Eardley Holding A.G. [Member] USD ($)	Mar. 31, 2013 Eardley Holding A.G. [Member] 06/23/2006 [Member] USD ($)		Mar. 31, 2013 Eardley Holding A.G. [Member] 06/23/2006 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 06/15/2009 [Member] USD ($)		Mar. 31, 2013 Eardley Holding A.G. [Member] 06/15/2009 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 08/04/2011 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 11/08/2011 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 02/14/2012 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 04/19/2012 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 05/04/2012 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 09/03/2012 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 12/06/2012 [Member] EUR (€)		Mar. 31, 2013 Eardley Holding A.G. [Member] 01/16/2013 [Member] EUR (€)		Mar. 31, 2013 Anglo Irish Bank S.A. [Member] 10/21/2007 [Member] USD ($)		Mar. 31, 2013 Anglo Irish Bank S.A. [Member] 10/21/2007 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] USD ($)	Mar. 31, 2013 Round Enterprises Ltd. [Member] 12/10/2007 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 12/10/2007 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 01/22/2008 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 01/22/2008 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 04/25/2008 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 04/25/2008 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 06/30/2008 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 06/30/2008 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 11/18/2008 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 11/18/2008 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 02/09/2009 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 02/09/2009 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 06/15/2009 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 06/15/2009 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 10/13/2009 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 10/13/2009 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 12/18/2009 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 12/18/2009 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 08/04/2011 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 11/08/2011 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 02/10/2012 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 04/19/2012 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 05/04/2012 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 09/03/2012 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 11/14/2012 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 01/16/2013 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 03/25/2013 [Member] USD ($)		Mar. 31, 2013 Round Enterprises Ltd. [Member] 03/25/2013 [Member] EUR (€)		Mar. 31, 2013 Von Meyenburg [Member] 08/03/2009 [Member] USD ($)		Mar. 31, 2013 Von Meyenburg [Member] 08/03/2009 [Member] EUR (€)		Mar. 31, 2013 Round Enterprises Ltd. and Eardley Holding A.G. [Member] USD ($)
Short term and long term debt instruments [Line Items]
Carrying value of convertible notes		€ 33,254
Issuance date of debt convertible																																															Mar. 25, 2013																																																													Jan. 16, 2013
Debt repayment and conversion price description																																															The conversion price is determined by the lower of (i) reducing by 10% the price per share of the Company's common stock paid by the investors in connection with an investment in the Company of not less than $20,000, or (ii) at three point six eight four US dollar cents (US $0.03684) per share of the Company's common stock, and using a fixed axchange rate of $1.2915 per Euro.																																																													The conversion price is determined by reducing by 10% the price per share of the Company's common stock paid by the investors in connection with an investment in the Company of not less than $20,000.
Conversion price reduction percentage (in hundredths)																																															10.00%																																																													10.00%
Conversion feature minimum investment amount																																															20,000																																																													20,000
Debt Instrument, Convertible, Conversion Ratio							0.03684	1.2915															1.4300	[1],[2]	1.4300	[1],[2]																	1.4090	[1],[3]	1.4090	[1],[3]		1.4429	[1]	1.4429	[1]	1.4629	[1]	1.4629	[1]	1.5889	[1]	1.5889	[1]	1.5380	[1]	1.5380	[1]	1.2650	[1]	1.2650	[1]	1.2940	[1]	1.2940	[1]	1.4045	[1],[2]	1.4045	[1],[2]	1.4854	[1]	1.4854	[1]	1.4338	[1]	1.4338	[1]																					1.4400	[1]	1.4400	[1]	1.3056
Maturity Date												Mar. 31, 2014																																			Jun. 30, 2013																																																													Jun. 30, 2013
Details of the convertible notes loans and contingent liabilities [Abstract]
1st-Issue Date												Apr. 03, 2009	[4]						Jun. 23, 2006	[1],[5]	Jun. 23, 2006	[1],[5]	Jun. 15, 2009	[1],[2]	Jun. 15, 2009	[1],[2]	Aug. 04, 2011	[6],[7]	Nov. 08, 2011	[6]	Feb. 14, 2012	[6]	Apr. 19, 2012	[6]	May 04, 2012	[6]	Sep. 03, 2012	[6]	Dec. 06, 2012	[6]	Jan. 16, 2013	[6]	Oct. 21, 2007	[1],[3]	Oct. 21, 2007	[1],[3]		Dec. 10, 2007	[1]	Dec. 10, 2007	[1]	Jan. 22, 2008	[1]	Jan. 22, 2008	[1]	Apr. 25, 2008	[1]	Apr. 25, 2008	[1]	Jun. 30, 2008	[1]	Jun. 30, 2008	[1]	Nov. 18, 2008	[1]	Nov. 18, 2008	[1]	Feb. 09, 2009	[1]	Feb. 09, 2009	[1]	Jun. 15, 2009	[1],[2]	Jun. 15, 2009	[1],[2]	Oct. 13, 2009	[1]	Oct. 13, 2009	[1]	Dec. 18, 2009	[1]	Dec. 18, 2009	[1]	Aug. 04, 2011	[6],[7]	Nov. 08, 2011	[6]	Feb. 10, 2012	[6]	Apr. 19, 2012	[6]	May 04, 2012	[6]	Sep. 03, 2012	[6]	Nov. 14, 2012	[6]	Jan. 16, 2013	[6]	Mar. 25, 2013	[8]	Mar. 25, 2013	[8]	Aug. 03, 2009	[1]	Aug. 03, 2009	[1]
Principal Amount, Short Term		27,795										2,500	[4]								144	[1],[5]			100	[1],[2]	227	[6],[7]	100	[6]	200	[6]	81	[6]	120	[6]	50	[6]	125	[6]	60	[6]			500	[1],[3]				1,500	[1]			1,500	[1]			2,000	[1]			1,500	[1]			1,200	[1]			1,500	[1]			5,500	[1],[2]			2,000	[1]			2,200	[1]	910	[6],[7]	400	[6]	1,000	[6]	321	[6]	480	[6]	200	[6]	500	[6]	240	[6]			400	[8]			200	[1]
Interest Rate (in hundredths)						5.00%						10.00%	[4]						10.00%	[1],[5]	10.00%	[1],[5]	10.00%	[1],[2]	10.00%	[1],[2]	10.00%	[6],[7]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[1],[3]	10.00%	[1],[3]		10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1]	10.00%	[1],[2]	10.00%	[1],[2]	5.00%	[1]	5.00%	[1]	5.00%	[1]	5.00%	[1]	10.00%	[6],[7]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[6]	10.00%	[8]	10.00%	[8]	10.00%	[1]	10.00%	[1]
Conversion Price (stated) (in dollars per share)				$ 0.50	$ 0.80														$ 0.10	[1],[5]			$ 0.80	[1],[2]																			$ 0.50	[1],[3]				$ 0.50	[1]			$ 0.50	[1]			$ 0.50	[1]			$ 0.50	[1]			$ 0.50	[1]			$ 0.50	[1]			$ 0.80	[1],[2]			$ 0.25	[1]			$ 0.25	[1]																			$ 0.03684	[8]			$ 0.80	[1]
Fixed EUR/USD Rate for Conversion Price							0.03684	1.2915															1.4300	[1],[2]	1.4300	[1],[2]																	1.4090	[1],[3]	1.4090	[1],[3]		1.4429	[1]	1.4429	[1]	1.4629	[1]	1.4629	[1]	1.5889	[1]	1.5889	[1]	1.5380	[1]	1.5380	[1]	1.2650	[1]	1.2650	[1]	1.2940	[1]	1.2940	[1]	1.4045	[1],[2]	1.4045	[1],[2]	1.4854	[1]	1.4854	[1]	1.4338	[1]	1.4338	[1]																					1.4400	[1]	1.4400	[1]	1.3056
Accrued Interest		8,232
TOTAL LOANS AND NOTES		36,027
Face Amount	190										2,500							300																													1,200
Maturity term extension period	3 months	3 months
Debt collateral description												The note is secured against 1/3rd of Bestewil common stock.																																																												The loan is secured against 2/3rds of the IP assets of Bestewil Holding BV and against all property of the Company.		The loan is secured against 2/3rds of the IP assets of Bestewil Holding BV and against all property of the Company.
Debt amendment amount payable														521	517		1,576
Debt amendment principal payable														500	500		1,500
Debt amendment interest payable														21	17	51	76
Outstanding principal after first payment											2,000
Outstanding principal after second payment											1,500
Total principal									500	1,000
Percentage of number of pledged shares before payment (in hundredths)									33.00%
Number of pledged shares before payment (in shares)									6,290
Percentage of number of pledged shares after payment (in hundredths)									26.70%
Number of pledged shares after payment (in shares)									5,032
Maximum number of days	20 days	20 days
Value of common stock	325
Common stock price duration	2 months	2 months
Percentage of number of pledged shares after second payment (in hundredths)										20.00%
Number of pledged shares after second payment (in shares)										3,774
Financing maximum limit	20,000
Financing minimum limit	5,000
Lock-up period for first half shares	6 months	6 months
Lock-up period for second half shares	12 months	12 months
Debt instrument face amount	190										2,500							300																													1,200
Required future payments on long term debt [Abstract]
2013		36,027	34,723
Contingent liability to Norwood (milestones and royalties)		254	6,533								0
Future payments on long-term debt		€ 36,027

[1] This maturity date is automatically prolonged for periods of 3 months, unless called for repayment.

[2] The loan is secured against 2/3rds of the IP assets of Bestewil Holding BV and against all property of the Company.

[3] Renamed Hyposwiss Private Bank Geneve S.A. and acting on behalf of Round Enterprises Ltd. which is a major shareholder.

[4] Under the terms of the acquisition of Bestewil BV, as part of the consideration, the Company issued to Norwood Immunology Limited ("NIL") a convertible redeemable note (the "Note") in the principal amount of E2,500 with a maturity date of March 31, 2014 and bearing interest at 10% per annum. The note is secured against 1/3rd of Bestewil common stock. On March 28, 2013, Mymetics agreed with Norwood Immunology Ltd (NIL) to amend the terms and conditions of the E2,500 loan that expired on March 31, 2013. Under the terms of the Amendment, Mymetics agreed to make a series of payments as follows to release it from any obligation to share revenues from the sale of Mymetics' intranasal influenza vaccine, RSV vaccine and HSV vaccine: (i) by April 30, 2013 E521 consisting of E500 of principal under the Loan Note and E21 of accrued interest for the month of April 2013 on the outstanding principal balance of E2,500, (ii) by May 31, 2013 E517 consisting of E500 of principal under the Loan Note and E17 of accrued interest for the month of May 2013 on the outstanding principal balance of E2,000, (iii) by September 30, 2013 accrued interest of E51 on the outstanding principal balance of E1,500 under the Loan Note and (iv) by March 31, 2014 E1,576 consisting of E1,500 to extinguish the outstanding principal balance of the Loan Note and E76 to extinguish the remaining unpaid accrued interest owed on the outstanding principal balance of the Loan Note. Upon payment by Mymetics of E500 of the principal under the Loan Note, the number of shares of Bestewil Holding B.V. pledged by Mymetics is reduced from 33% (6,290 shares) to 26.7% (5,032 shares). Upon payment by Mymetics of E1,000 of principal under the Loan Note the number of shares of Bestewil Holding B.V. pledged by Mymetics is reduced from 33% (6,290 shares) to 20% (3,774 shares). In addition, Mymetics shall issue, within twenty days of receipt of the first tranche of the investment, $325 in shares of the Company's common stock at the lower of (i) the average closing price of the last two months prior to the repayment date or (ii) the lowest conversion price for any Mymetics shareholder loan that has been converted two months prior or two months after such repayment or (iii) Investor Price. In the event that Mymetics raises financing greater than $20,000 earlier than completing the payment schedule above, it will (i) pay half the remaining unpaid principal and interest in cash, (ii) issue shares of its common stock to Norwood for the remaining half of the unpaid principal and interest at the same price and with the same rights as the shares purchased by the investors in such financing and (iii) issue $325 in shares of Mymetics common stock at the lower of (a) the average closing price of the last two months prior to the repayment date or (b) the lowest conversion price for any Mymetics shareholder loan that has been converted two months prior or two months after such repayment or (c) the new investor price (the "Conversion Price"). If Mymetics raises financing over $5,000 and less than $20,000, Norwood has the option to convert half of the remaining unpaid principal and interest under the Loan Note into cash and half of the remaining unpaid principal and interest under the Loan Note into those shares of Mymetics purchased by the investors and at the price at which the shares are issued to the investors and Norwood will receive $325 in shares of Mymetics common stock at the Conversion Price. In both financings described above, half the shares received by Norwood shall be subject to a six month lock-up and half of the shares shall be subject to a 12 month lock-up. In the event Mymetics is not able to make any of the above payments to Norwood, the Loan Note will be immediately due and payable and Mymetics will issue $325 in shares of its common stock at the lower of the Conversion Price or the market closing price the day before the default.

[5] Private investment company of Dr. Thomas Staehelin, member of the Board of Directors and of the Audit Committee of the Company. Face value is stated in U.S. dollars at $190.

[6] This maturity date is automatically prolonged for periods of 3 months, unless called for repayment. The conversion price is determined by reducing by 10% the price per share of the Company's common stock paid by the investors in connection with an investment in the Company of not less than $20,000.

[7] The face values of the loans are stated in U.S. dollars at $1,200 and $300, respectively.

[8] This maturity date is automatically prolonged for periods of 3 months, unless called for repayment. The conversion price is determined by the lower of (i) reducing by 10% the price per share of the Company's common stock paid by the investors in connection with an investment in the Company of not less than $20,000. or (ii) at three point six eight four US dollar cents (US$ 0.03684) per share of the Company's common stock.