Nature of Operations and Summary of Significant Accounting Policies (Details Textual) (USD $) Share data in Thousands, unless otherwise specified	12 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 UNITED STATES	Sep. 30, 2011 UNITED STATES
Nature of Operations and Summary of Significant Accounting Policies (Textual) [Abstract]
Percentage of net revenue from one or more separate U.S corporate entities on quarterly basis			21.00%	7.00%
Nature of Operations and Summary of Significant Accounting Policies (Additional Textual) [Abstract]
Common stock equivalents included in Diluted earnings per share	0	0
Cash equivalents consist of short-term certificates of deposit maturities period	3 months
Net unrealized gains/losses	$ 807,000	$ 3,789,000
Estimated interest accrued	545,000	568,000
Percentage of Reduction in Cost basis of inventories due to obsolescence in case inventories three to four years old	50.00%
Percentage of Reduction in Cost basis of inventories due to obsolescence in case inventories four to five years old	75.00%
Inventory, time period on the shelf, years	4 years
Minimum period of inventories remain old to become eligible for reduction in cost basis under condition one	3 years
Maximum period of inventories remain old to become eligible for reduction in cost basis under condition two	5 years
Minimum period of inventories remain old to become eligible for reduction in cost basis up to a specific percentage under condition one	4 years
Maximum period of inventories remain old to become eligible for reduction in cost basis up to a specific percentage under condition two	5 years
Inventory valuation estimate	$ 0
Time for the collection of cost associated with Pre- contract	1 year
Percentage of net revenue from one or more separate U.S corporate entities on yearly basis	26.00%	7.00%