CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (339,702)	$ 634,700
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	87,735	65,401
Amortization of bond premium	2,247	6,632
Stock-based compensation	478,355	193,093
Provision for uncollectible accounts	78,985	20,000
Provision for sales returns	(32,000)	(25,000)
Provision for inventory reserves	(7,000)	(567,000)
Benefit for deferred income taxes	0	(102,443)
Loss on disposal of assets	94,408	0
Loss on call of long-term investments	2,913	0
Changes in assets and liabilities:
Accounts receivable	(538,934)	(1,539,375)
Interest receivable	(584)	(22,542)
Income tax receivable	113,030	0
Note receivable	0	54,627
Inventory	1,256,382	1,553,494
Prepaid expenses and other assets, net	(75,893)	(131,780)
Accounts payable	250,036	188,320
Accrued cooperative advertising	107,000	310,500
Accrued income taxes	34,909	(9,575)
Other accrued liabilities, net	(126,323)	1,785
Net cash provided by operating activities	1,385,564	630,837
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(581,669)	(66,519)
Purchases of long-term investments	(4,745,625)	(5,056,990)
Proceeds from call of long-term investments	2,250,000	0
Patent and license rights costs	(10,433)	(10,038)
Net cash used in investing activities	(3,087,727)	(5,133,547)
CASH FLOWS FROM FINANCING ACTIVITIES:
Stock option exercises	24,815	165,398
Net cash provided by financing activities	24,815	165,398
NET DECREASE IN CASH AND CASH EQUIVALENTS	(1,677,348)	(4,337,312)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	7,736,044	7,405,685
CASH AND CASH EQUIVALENTS, END OF PERIOD	6,058,696	3,068,373
Supplemental disclosure of cash flow information:
Cash paid during the year for interest	$ 262	$ 1,765