Significant Customers (Tables)

6 Months Ended

Jun. 30, 2012

Significant Customers [Abstract]

Sales by product and by geographical region

	Three Months Ended June 30,					Six Months Ended June 30,
	2012		2011			2012		2011
Instruments	$	559,167	$	1,153,534	Instruments	$	1,127,737	$	1,964,532
Handpieces		1,729,302		1,279,643	Handpieces		3,039,282		2,859,967
Other		38,507		30,942	Other		81,315		65,608
	$	2,326,976	$	2,464,119		$	4,248,334	$	4,890,107
United States	$	1,043,646	$	1,365,685	United States	$	1,914,136	$	2,678,252
Canada		193,336		151,383	Canada		336,846		304,508
Other Foreign		1,089,994		947,051	Other Foreign		1,997,352		1,907,347
	$	2,326,976	$	2,464,119		$	4,248,334	$	4,890,107