CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (230,047)	$ 1,146,652
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	201,340	99,130
Amortization of bond premium	3,335	10,390
Stock-based compensation	686,945	273,357
Provision for uncollectible accounts	300,985	410,000
Provision for sales returns	(45,000)	(88,000)
Provision for inventory reserves	(138,000)	(694,000)
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	(38,359)	(2,501,285)
Interest receivable	(11,146)	(37,756)
Income tax receivable	113,030	(113,030)
Note receivable	0	54,627
Inventory	932,813	2,152,504
Prepaid expenses and other assets, net	72,718	(98,243)
Accounts payable	168,906	30,427
Accrued cooperative advertising	34,000	373,000
Accrued income taxes	(208,273)	(115,008)
Other accrued liabilities	(102,101)	51,120
Net cash provided by operating activities	1,838,467	851,442
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(865,942)	(92,643)
Purchases of long-term investments	(6,245,625)	(5,056,990)
Proceeds from call of long-term investments	2,250,000	750,000
Patent and license rights costs	(34,952)	(33,638)
Net cash used in investing activities	(4,896,519)	(4,433,271)
CASH FLOWS FROM FINANCING ACTIVITIES:
Stock option exercises	46,872	178,135
Share repurchases	(335,197)	0
Net cash (used in) provided by financing activities	(288,325)	178,135
NET DECREASE IN CASH AND CASH EQUIVALENTS	(3,346,377)	(3,403,694)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	7,736,044	7,405,685
CASH AND CASH EQUIVALENTS, END OF PERIOD	4,389,667	4,001,991
Supplemental disclosure of cash flow information:
Cash paid during the year for interest	$ 718	$ 2,645