Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue:
Product revenue, net	$ 2,028,529	$ 2,164,697	$ 7,061,504	$ 7,706,487
Other revenue	72,435	78,217	231,591	245,321
Net revenue	2,100,964	2,242,914	7,293,095	7,951,808
Operating expense:
Cost of revenue	1,571,575	1,894,001	5,349,594	5,699,089
Gross profit	529,389	348,913	1,943,501	2,252,719
Research and development expense	396,503	421,597	1,210,168	1,282,618
Selling, general and administrative expense	789,169	935,857	2,546,334	3,063,446
Loss from operations	(656,283)	(1,008,541)	(1,813,001)	(2,093,345)
Interest income		591		3,929
Interest expense	(2,056)	(1,965)	(5,093)	(3,763)
Other, net			7,199	(43)
Loss before provision for income taxes	(658,339)	(1,009,915)	(1,810,895)	(2,093,222)
Provisions for income taxes
Net loss	$ (658,339)	$ (1,009,915)	$ (1,810,895)	$ (2,093,222)
Net loss per share - basic and diluted	$ (0.02)	$ (0.05)	$ (0.08)	$ (0.10)
Weighted average number of basic and diluted common shares outstanding	26,960,880	21,207,597	23,139,731	21,205,320