Significant Customers (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Sales by product and by geographical region
Total sales	$ 2,326,976	$ 2,464,119	$ 4,248,334	$ 4,890,107
United States [Member]
Sales by product and by geographical region
Total sales	1,043,646	1,365,685	1,914,136	2,678,252
Canada [Member]
Sales by product and by geographical region
Total sales	193,336	151,383	336,846	304,508
Other Foreign [Member]
Sales by product and by geographical region
Total sales	1,089,994	947,051	1,997,352	1,907,347
Instruments [Member]
Sales by product and by geographical region
Total sales	559,167	1,153,534	1,127,737	1,964,532
Handpieces [Member]
Sales by product and by geographical region
Total sales	1,729,302	1,279,643	3,039,282	2,859,967
Other [Member]
Sales by product and by geographical region
Total sales	$ 38,507	$ 30,942	$ 81,315	$ 65,608