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Investments (Details) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Available-for-sale securities:
Cost	$ 5,317,422	$ 7,905,843
Gross Unrealized Gains	2,777	4,027
Gross Unrealized Losses	(857)	(4,643)
Fair Market Value	5,319,342	7,905,227
Corporate debt securities [Member] | Short-term [Member]
Available-for-sale securities:
Cost	4,899,835	5,818,549
Gross Unrealized Gains	2,348	3,343
Gross Unrealized Losses	(857)	(2,355)
Fair Market Value	4,901,326	5,819,537
Corporate debt securities [Member] | Long-term [Member]
Available-for-sale securities:
Cost	417,587	2,087,294
Gross Unrealized Gains	429	684
Gross Unrealized Losses		(2,288)
Fair Market Value	$ 418,016	$ 2,085,690

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