Statements of Operations (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Revenue:
Product revenue	$ 9,725,064	$ 9,321,042
Other revenue	311,641	329,745
Total revenue	10,036,705	9,650,787
Operating expense:
Cost of revenue	7,395,332	7,322,247
Gross profit	2,641,373	2,328,540
Research and development expense	1,626,669	1,737,201
Selling, general and administrative expense	3,403,163	3,954,750
Loss from operations	(2,388,459)	(3,363,411)
Interest income	57	3,928
Interest expense	(7,119)	(4,012)
Other, net	2,947	(42)
Loss before provision for income taxes	(2,392,574)	(3,363,537)
Provision for income taxes
Net loss	$ (2,392,574)	$ (3,363,537)
Net loss per share-basic and diluted	$ (0.10)	$ (0.16)
Weighted average number of basic and diluted common shares outstanding	24,476,605	21,206,036