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7. Noncontrolling Interest (Details)
3 Months Ended 6 Months Ended 3 Months Ended
Jun. 30, 2013
USD ($)
Jun. 30, 2012
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2012
USD ($)
Jun. 30, 2013
DiaMed Spain [Member]
USD ($)
Feb. 14, 2013
DiaMed Spain [Member]
USD ($)
Feb. 14, 2013
DiaMed Spain [Member]
EUR (€)
Noncontrolling Interest [Line Items]              
Business Acquisition, Cost of Acquired Entity, Purchase Price           $ 900,000 € 600,000
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]              
Noncontrolling interests, beginning of period     535,000        
Net loss attributable to noncontrolling interest 0 222,000 21,000 161,000      
Purchase of noncontrolling interests         (600,000)    
Currency fluctuations     100,000        
Noncontrolling interests, end of period 0   0        
Adjustments to Additional Paid in Capital, Reallocation of Noncontrolling Interest         $ (300,000)