Annual report pursuant to Section 13 and 15(d)

Restructuring (Textual) (Details)

v2.4.0.6
Restructuring (Textual) (Details) (USD $)
3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Sep. 30, 2012
employee
Mar. 31, 2012
Q1 2012 Restructuring Plan [Member]
employee
Dec. 31, 2012
Q1 2012 Restructuring Plan [Member]
Dec. 31, 2011
Q1 2012 Restructuring Plan [Member]
Dec. 31, 2012
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2011
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2012
Employee Severance [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2011
Employee Severance [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2012
Facility Closing [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2011
Facility Closing [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2012
Leasehold Improvement Write Down [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2012
Equipment Disposal Charges [Member]
Q3 2012 Restructuring Plan [Member]
Sep. 30, 2012
Research and Development Functions [Member]
employee
Sep. 30, 2012
General and Administrative Functions [Member]
employee
Dec. 31, 2012
Selling, General and Administrative [Member]
Q1 2012 Restructuring Plan [Member]
Dec. 31, 2012
Selling, General and Administrative [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2012
Research and Development [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2012
Accrued Compensation [Member]
Q3 2012 Restructuring Plan [Member]
Dec. 31, 2012
Accrued Expenses [Member]
Q3 2012 Restructuring Plan [Member]
Restructuring (Textual) [Abstract]                                      
Number of positions eliminated (employee) 173 13                     150 23          
Estimated cost of restructuring plan   $ 567,000                                  
Restructuring charges adjusted         2,400,000   700,000       (1,100,000)                
Restructuring charges     572,000   1,124,000   804,000   320,000     300,000     572,000 1,500,000 900,000    
Cash payments     512,000   611,000   611,000   0                    
Adjustment to previously accrued charges     60,000   93,000   93,000   0                    
Restructuring reserve     $ 0 $ 0 $ 420,000 $ 0 $ 100,000 $ 0 $ 320,000 $ 0               $ 68,000 $ 400,000