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Taxes (Tables)
 12 Months Ended
Dec. 31, 2014
Taxes  
Schedule of components of (loss) gain before taxes from continuing operations

 

   

Year Ended

December 31,

2013

    

Year Ended

December 31,

2014

  
             
Domestic   $ 1,132     $ (2,898 )
Foreign     (13,012 )     (19,751 )
Loss from continuing operations before taxes   $ (11,880 )   $ (22,649 )
Schedule of benefit for income taxes from continuing operations
   

Year Ended

December 31,

2013

    

Year Ended

December 31,

2014

  
             
Current — domestic   $ (25 )   $ 34  
Current — foreign     1,695       3,209  
Current — total     1,670       3,243  
Deferred — domestic     —       —  
Income tax benefit   $ 1,670     $ 3,243  
Schedule of reconciliation of the (benefit) provision for income taxes from continuing operations with the amount computed by applying the statutory federal tax rate to loss before income taxes
​ ​ ​
Year Ended
December 31,
2013
 ​ ​
Year Ended
December 31,
2014
 ​
Loss from continuing operations before taxes
 ​ ​ ​ $ (11,880) ​ ​ ​ ​ $ (22,649) ​ ​
Income tax expense computed at statutory federal tax rate
 ​ ​ ​ ​ (4,039) ​ ​ ​ ​ ​ (7,701) ​ ​
Disallowed expenses and non-taxable income
 ​ ​ ​ ​ 62 ​ ​ ​ ​ ​ 406 ​ ​
Loss surrendered to generate R&D credit
 ​ ​ ​ ​ 4,833 ​ ​ ​ ​ ​ 7,294 ​ ​
Additional research and development tax relief
 ​ ​ ​ ​ (4,418) ​ ​ ​ ​ ​ (7,262) ​ ​
Change in valuation allowance
 ​ ​ ​ ​ 6,302 ​ ​ ​ ​ ​ (4,963) ​ ​
Research and development credit – prior years
 ​ ​ ​ ​ (4,530) ​ ​ ​ ​ ​ — ​ ​
Foreign items, including change in tax rates, and other
 ​ ​ ​ ​ 120 ​ ​ ​ ​ ​ 3,555 ​ ​
Other foreign items
 ​ ​ ​ ​ — ​ ​ ​ ​ ​ 5,428 ​ ​
​ ​ ​ ​ $ (1,670) ​ ​ ​ ​ $ (3,243) ​ ​
​
 
Schedule of significant components of the entity's deferred tax assets
​ ​ ​
December 31,
 ​
​ ​ ​
2013
 ​ ​
2014
 ​
Net operating loss carryforwards
 ​ ​ ​ $ 46,144 ​ ​ ​ ​ $ 45,060 ​ ​
Depreciation, amortization and impairment of property and equipment
 ​ ​ ​ ​ 67 ​ ​ ​ ​ ​ 81 ​ ​
Stock options
 ​ ​ ​ ​ 1,651 ​ ​ ​ ​ ​ 1,815 ​ ​
Accrued expenses
 ​ ​ ​ ​ 3,373 ​ ​ ​ ​ ​ 179 ​ ​
Research and development credits
 ​ ​ ​ ​ 4,530 ​ ​ ​ ​ ​ 4,332 ​ ​
Other
 ​ ​ ​ ​ 82 ​ ​ ​ ​ ​ 78 ​ ​
Translation adjustment
 ​ ​ ​ ​ 660 ​ ​ ​ ​ ​ — ​ ​
Deferred tax assets
 ​ ​ ​ ​ 56,507 ​ ​ ​ ​ ​ 51,545 ​ ​
Valuation allowance for deferred tax assets
 ​ ​ ​ ​ (56,507) ​ ​ ​ ​ ​ (51,545) ​ ​
Net deferred taxes
 ​ ​ ​ $ — ​ ​ ​ ​ $ — ​ ​
​