Significant Customers (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Sales by product and by geographical region
Total sales	$ 2,489,542	$ 1,921,358
United States
Sales by product and by geographical region
Total sales	1,300,500	870,490
Canada
Sales by product and by geographical region
Total sales	55,602	143,510
Other Foreign
Sales by product and by geographical region
Total sales	1,133,440	907,358
Instruments
Sales by product and by geographical region
Total sales	517,450	568,570
Handpieces
Sales by product and by geographical region
Total sales	1,925,663	1,309,980
Other
Sales by product and by geographical region
Total sales	$ 46,429	$ 42,808