Concentrations of Risks (Details)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended				3 Months Ended	12 Months Ended
	Dec. 31, 2012 Net revenue Sales risk TTI, Inc. customer	Dec. 31, 2011 Net revenue Sales risk TTI, Inc. customer	Dec. 31, 2012 Net revenue Sales risk TTI, Inc. customer	Dec. 31, 2011 Net revenue Sales risk TTI, Inc. customer	Dec. 31, 2012 Net revenue Sales risk TTI, Inc. Minimum	Dec. 31, 2011 Net revenue Sales risk TTI, Inc. Minimum	Dec. 31, 2012 Net revenue Sales risk TTI, Inc. Minimum	Dec. 31, 2011 Net revenue Sales risk TTI, Inc. Minimum	Dec. 31, 2012 Net revenue Electronics distributor risk	Dec. 31, 2011 Net revenue Electronics distributor risk	Dec. 31, 2012 Accounts receivable Sales risk Flextronics International LTD. customer	Mar. 31, 2012 Accounts receivable Credit risk	Dec. 31, 2012 Number of employees Unionized labor risk Mexico employee	Dec. 31, 2012 Number of employees Unionized labor risk Portugal employee	Dec. 31, 2012 Number of employees Unionized labor risk Italy employee	Dec. 31, 2012 Number of employees Unionized labor risk Indonesia employee	Dec. 31, 2012 Number of employees Unionized labor risk China employee	Dec. 31, 2012 Number of employees Unionized labor risk Bulgaria employee	Dec. 31, 2012 Number of employees Unionized labor risk Finland employee	Dec. 31, 2012 Number of employees Unionized labor risk Sweden employee	Dec. 31, 2012 Number of employees Employee risk employee	Dec. 31, 2012 Number of employees Employee risk United States employee	Dec. 31, 2012 Number of employees Employee risk Mexico employee	Dec. 31, 2012 Number of employees Employee risk Asia employee	Dec. 31, 2012 Number of employees Employee risk Europe employee
Concentration of Risk
Number of customers that accounted for over 10% of sales or accounts receivable	1	1	1	1							1
Concentration risk, percentage					10.00%	10.00%	10.00%	10.00%	44.00%	44.00%	10.00%
Disclosure threshold (as a percent)												10.00%
Number of employees													3,300	100	700	200	200	200	200	100	9,800	700	4,800	2,400	1,900