CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income (loss)	$ 286,839	$ (3,057,606)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Realized gain on sales of marketable securities	(328,217)
Share-based compensation	226,490	323,720
Provision for doubtful accounts	103,710
Depreciation and amortization	36,094	60,536
Provision for obsolete inventory		11,520
Loss on disposal of property and equipment		739
Changes in operating assets and liabilities:
Accounts receivable	2,714,549	(1,872,084)
Inventories	1,102,098	(745,644)
Prepaid expenses and other current assets	44,658	(910,120)
Accounts payable	(3,171,903)	241,785
Accrued expenses and other current liabilities	(1,219,221)	414,028
Net cash used in operating activities	(204,903)	(5,533,126)
Investing activities:
Purchases of marketable securities	(38,496,126)
Proceeds from sales of marketable securities	38,146,602
Purchases of property and equipment	(29,510)	(59,263)
Proceeds from note receivable		400,000
Net cash (used in) provided by investing activities	(379,034)	340,737
Net decrease in cash and cash equivalents	(583,937)	(5,192,389)
Cash and cash equivalents at beginning of period	4,608,246	14,911,844
Cash and cash equivalents at end of period	4,024,309	9,719,455
Cash paid for:
Income taxes	$ 507