Quarterly report pursuant to Section 13 or 15(d)

Restructuring (Details Textual)

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Restructuring (Details Textual) (USD $)
3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2012
Q1 2012 Restructuring Plan [Member]
employee
Mar. 31, 2012
Q1 2012 Restructuring Plan [Member]
General and administrative functions [Member]
Mar. 31, 2013
Q3 2012 Restructuring Plan[Member]
Dec. 31, 2012
Q3 2012 Restructuring Plan[Member]
Sep. 30, 2012
Q3 2012 Restructuring Plan[Member]
United States and Singapore [Member]
employee
Sep. 30, 2012
Q3 2012 Restructuring Plan[Member]
United States and Singapore [Member]
Research and development functions [Member]
employee
Sep. 30, 2012
Q3 2012 Restructuring Plan[Member]
United States and Singapore [Member]
General and administrative functions [Member]
employee
Mar. 31, 2013
Leasehold improvement write down [Member]
Q3 2012 Restructuring Plan[Member]
Mar. 31, 2012
Employee severance [Member]
Q1 2012 Restructuring Plan [Member]
Mar. 31, 2013
Employee severance [Member]
Q3 2012 Restructuring Plan[Member]
Dec. 31, 2012
Employee severance [Member]
Q3 2012 Restructuring Plan[Member]
Mar. 31, 2013
Facility lease termination [Member]
Q3 2012 Restructuring Plan[Member]
Dec. 31, 2012
Facility lease termination [Member]
Q3 2012 Restructuring Plan[Member]
Mar. 31, 2013
Other termination benefits [Member]
Q3 2012 Restructuring Plan[Member]
Restructuring Cost and Reserve [Line Items]                            
Employee terminations 13       173 150 23              
Estimated cost of restructuring plan   $ 510,000 $ 2,400,000         $ 1,100,000 $ 572,000 $ 700,000   $ 300,000   $ 300,000
Accrued expenses     158,000 420,000           13,000 100,000 145,000 320,000  
Cash payments 24,000   248,000             73,000   175,000    
Adjustment to previously accrued charges     $ (14,000)             $ (14,000)   $ 0