Restatement of Previously Issued Fiancial Statements (Details Textual) (USD $) In Thousands, unless otherwise specified	2 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended
	Feb. 28, 2013 customer Distributor	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2012 Other Restatement Adjustments [Member]	Jun. 30, 2011 Other Restatement Adjustments [Member]
Number of distributors, arrangements with extended payment terms	3
Number of distributors, arrangements with return rights and profit margin protection	1
Number of non-distributor customer, arrangements with honor transfer of title at a date later than the customer's purchase orders indicated	1
Reclassification to contra-revenue		$ 55,610	$ 36,238	$ 103,358	$ 72,042		$ (2,600)
Decrease in income tax provision		$ 749	$ 719	$ 1,673	$ 1,433	$ (54)