Income Taxes (Details) (EUR €) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Income Tax [Abstract]
U.S. Federal statutory rates on loss from operations	€ 2,057	€ (2,077)
Effect of foreign statutory rate differences	(228)	99
Effect of exchange rate changes	805	(212)
Expiration/disallowance of net operating loss carry forwards	566	638
Permanent differences	(2,141)	(265)
Change in valuation allowance	(1,026)	1,815
Other	15	5
Income tax provision	48	3
Components of Deferred Tax Assets [Abstract]
Licenses capitalized for United States tax purposes	928	1,080
IPR&D basis difference	(770)	(615)
Stock options	145	125
Foreign tax credit carry over	193	0
Operating Loss Carry Forwards [Line Items]
Deferred tax asset, gross	18,272	19,298
Less valuation allowance for deferred tax asset	(18,272)	(19,298)
Net deferred tax asset	0	0
UNITED STATES
Operating Loss Carry Forwards [Line Items]
Net operating loss carry forwards	16,710	17,020
Estimated net operating loss carryforwards	49,145
UNITED STATES | 2014 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
UNITED STATES | 2015 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
UNITED STATES | 2016 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
UNITED STATES | 2017 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
UNITED STATES | 2018 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	570
UNITED STATES | 2019-2032 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	48,575
UNITED STATES | Perpetual [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
SWITZERLAND
Operating Loss Carry Forwards [Line Items]
Net operating loss carry forwards	884	897
Estimated net operating loss carryforwards	3,551
SWITZERLAND | 2014 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
SWITZERLAND | 2015 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
SWITZERLAND | 2016 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	1,367
SWITZERLAND | 2017 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	1,267
SWITZERLAND | 2018 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	469
SWITZERLAND | 2019-2032 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	448
SWITZERLAND | Perpetual [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
NETHERLANDS
Operating Loss Carry Forwards [Line Items]
Net operating loss carry forwards	0	611
Estimated net operating loss carryforwards	0
NETHERLANDS | 2014 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
NETHERLANDS | 2015 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
NETHERLANDS | 2016 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
NETHERLANDS | 2017 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
NETHERLANDS | 2018 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
NETHERLANDS | 2019-2032 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
NETHERLANDS | Perpetual [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
LUXEMBOURG
Operating Loss Carry Forwards [Line Items]
Net operating loss carry forwards	182	180
Estimated net operating loss carryforwards	827
LUXEMBOURG | 2014 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
LUXEMBOURG | 2015 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
LUXEMBOURG | 2016 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
LUXEMBOURG | 2017 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
LUXEMBOURG | 2019-2032 [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	0
LUXEMBOURG | Perpetual [Member]
Operating Loss Carry Forwards [Line Items]
Estimated net operating loss carryforwards	€ 827