Concentration of Credit Risk (Details) (USD $)	9 Months Ended
	Sep. 30, 2012 Instruments	Dec. 31, 2011
Concentration of Credit Risk (Textual) [Abstract]
Advance for purchase of materials	$ 940,318	$ 952,558
CompuDent Instruments [Member]
Concentration of Credit Risk (Textual) [Abstract]
Number of instrument on purchase agreement	5,000
Advance for purchase of materials	3,091,000
Number of instrument remaining on purchase order	653
STA Instruments [Member]
Concentration of Credit Risk (Textual) [Abstract]
Number of instrument on purchase agreement	12,000
Advance for purchase of materials		$ 3,407,000
Number of instrument remaining on purchase order	8,569