Commitments and Contingencies - Additional Information (Detail)	1 Months Ended
	Jun. 30, 2004 San Francisco County, California	Dec. 31, 2006 Eastern District of Pennsylvania
Commitments and Contingencies Disclosure [Line Items]
Lawsuit filing date	June 18, 2004	December 12, 2006
Name of plaintiff(s)	Marvin Weinstat, DDS and Richard Nathan, DDS	Carole Hildebrand, DDS and Robert Jaffin, DDS and Dr. Mitchell Goldman
Class action law suit filed	On June 18, 2004, Marvin Weinstat, DDS and Richard Nathan, DDS filed a class action suit in San Francisco County, California alleging that the Company misrepresented that its Cavitron® ultrasonic scalers are suitable for use in oral surgical procedures.	On December 12, 2006, a Complaint was filed by Carole Hildebrand, DDS and Robert Jaffin, DDS in the Eastern District of Pennsylvania (the Plaintiffs subsequently added Dr. Mitchell Goldman as a named class representative).  The case was filed by the same law firm that filed the Weinstat case in California.  The Complaint asserts putative class action claims on behalf of dentists located in New Jersey and Pennsylvania.