Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Sep. 30, 2012
Current assets:
Cash	$ 15,805,195	$ 13,859,505
Accounts receivable, less allowance of $3,772 and $4,372 for doubtful accounts	4,958,532	5,517,894
Inventories, net	4,587,750	3,112,489
Prepaid expenses and other	1,003,875	441,823
Total current assets	26,355,352	22,931,711
Property and equipment, net	237,377	212,863
Intangible assets, net	51,650	158,457
Prepaid expenses and other - noncurrent	914,516	1,102,016
Total assets	27,558,895	24,405,047
Current liabilities:
Accounts payable	1,596,409	995,719
Accrued liabilities	1,054,968	623,742
Total current liabilities	2,651,377	1,619,461
Other liabilities - noncurrent	146,109	363,817
Total liabilities	2,797,486	1,983,278
Common stock, $0.00001 par value; 50,000,000 shares authorized; 32,900,705 and 32,374,499 shares issued and outstanding, respectively	329	324
Additional paid-in capital	87,434,834	86,358,011
Accumulated deficit	(62,673,754)	(63,936,566)
Total stockholders' equity	24,761,409	22,421,769
Total liabilities and stockholders' equity	$ 27,558,895	$ 24,405,047