Concentrations of Risks (Details)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended					12 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2014 Net revenue Sales risk customer	Sep. 30, 2013 Net revenue Sales risk customer	Sep. 30, 2014 Net revenue Sales risk customer	Sep. 30, 2013 Net revenue Sales risk customer	Sep. 30, 2014 Net revenue Sales risk Minimum	Sep. 30, 2013 Net revenue Sales risk Minimum	Sep. 30, 2014 Net revenue Sales risk Minimum	Sep. 30, 2013 Net revenue Sales risk Minimum	Sep. 30, 2014 Net revenue Electronics distributor risk	Sep. 30, 2013 Net revenue Electronics distributor risk	Sep. 30, 2014 Accounts receivable Sales risk customer	Mar. 31, 2014 Accounts receivable Sales risk customer	Sep. 30, 2014 Accounts receivable Sales risk Maximum	Mar. 31, 2014 Accounts receivable Sales risk Maximum
Concentration of Risk
Number of customers exceeding threshold	1	1	1	1							0	0
Concentration risk, percentage					10.00%	10.00%	10.00%	10.00%	44.00%	43.00%			10.00%	10.00%