Concentration of Credit Risk (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2012 Instrument	Dec. 31, 2011
Concentration of Credit Risk (Textual) [Abstract]
Advance for purchase of materials	$ 940,318	$ 952,558
Number of instrument remaining on purchase order	653	9,019
CompuDent Instrument [Member]
Concentration of Credit Risk (Textual) [Abstract]
Number of instrument on purchase agreement	5,000
Advance for purchase of materials	3,235,000
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