CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) [Abstract]
Net sales	$ 2,994,280	$ 3,328,629	$ 5,971,836	$ 6,182,304
Costs and expenses:
Cost of goods sold	1,296,635	1,399,264	2,625,156	2,458,245
Sales and marketing	551,981	575,015	1,233,266	1,161,613
General and administrative	1,133,403	1,021,802	2,318,375	2,045,467
Research and development	30,958	8,993	43,506	50,850
Total costs and expenses	3,012,977	3,005,074	6,220,303	5,716,175
(Loss) income from operations	(18,697)	323,555	(248,467)	466,129
Other income (expense):
Interest income	23,339	31,796	41,258	58,318
Interest expense	(250)	(1,089)	(262)	(1,765)
Loss on disposal of assets	(94,408)	0	(94,408)	0
Loss on call of long-term investments	0	0	(2,913)	0
Total other income (expense)	(71,319)	30,707	(56,325)	56,553
(Loss) income before income taxes	(90,016)	354,262	(304,792)	522,682
Income tax net (expense) benefit	(13,298)	(17,947)	(34,910)	112,018
Net (loss) income	$ (103,314)	$ 336,315	$ (339,702)	$ 634,700
Net (loss) income per common share:
Basic (in dollars per share)	$ (0.01)	$ 0.02	$ (0.02)	$ 0.03
Fully diluted (in dollars per share)	$ (0.01)	$ 0.02	$ (0.02)	$ 0.03
Weighted average number of shares used in computing net (loss) income per common share:
Basic (in shares)	19,471,342	19,148,074	19,385,081	19,084,107
Fully diluted (in shares)	19,471,342	19,409,154	19,385,081	19,321,801