Long-term Debts and Lines of Credit - Additional Information (Detail)						3 Months Ended								3 Months Ended										1 Months Ended
	Mar. 31, 2015 Participation Rights Agreement In March 2009 [Member] EUR (€)	Mar. 31, 2015 Participation Rights Agreement In March 2009 [Member] Tranche One [Member] EUR (€)	Mar. 31, 2015 Participation Rights Agreement In March 2009 [Member] Tranche Two [Member] EUR (€)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] USD ($)	Dec. 31, 2012 Medite GmbH, Burgdorf [Member] EUR (€)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 1 Issued in July 2006 [Member] USD ($)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 1 Issued in July 2006 [Member] EUR (€)	Jan. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 1 Issued in July 2006 [Member] EUR (€)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 1 Issued in July 2006 [Member] Maximum [Member]	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 1 Issued in July 2006 [Member] Minimum [Member]	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 1 Issued in July 2006 [Member] Subsequent Event [Member] USD ($)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 2 Issued in July 2006 [Member] USD ($)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank Credit lines 2 Issued in July 2006 [Member] EUR (€)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank term loan 1 Issued in December 2006 [Member] USD ($)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank term loan 1 Issued in December 2006 [Member] EUR (€)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank term loan 2 Issued in June 2006 [Member] USD ($)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank term loan 2 Issued in June 2006 [Member] EUR (€)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank term loan 3 Issued in November 2008 [Member] USD ($)	Mar. 31, 2015 Medite GmbH, Burgdorf [Member] Hannoversech Volksbank term loan 3 Issued in November 2008 [Member] EUR (€)	Mar. 31, 2015 CytoGlobe, GmbH, Burgdorf [Member] Hannoversech Volksbank Credit line 3 Issued in June 2012 [Member] USD ($)	Mar. 31, 2015 CytoGlobe, GmbH, Burgdorf [Member] Hannoversech Volksbank Credit line 3 Issued in June 2012 [Member] EUR (€)	Mar. 31, 2015 CytoGlobe, GmbH, Burgdorf [Member] Hannoversech Volksbank Credit line 3 Issued in June 2012 [Member] Maximum [Member]	Mar. 31, 2015 CytoGlobe, GmbH, Burgdorf [Member] Hannoversech Volksbank Credit line 3 Issued in June 2012 [Member] Minimum [Member]	Feb. 23, 2015 Ventana Medical Systems, Inc [Member] USD ($)	Mar. 31, 2015 Ventana Medical Systems, Inc [Member] USD ($)
Line of Credit Facility [Line Items]
Debt instrument face amount	€ 1,500,000	€ 750,000	€ 750,000											$ 542,500	€ 500,000	$ 434,000	€ 400,000	$ 434,000	€ 400,000
Debt Instrument, Interest Rate, Stated Percentage	12.15%								8.00%	3.77%				3.40%	3.40%	3.60%	3.60%	4.70%	4.70%			8.00%	3.77%
Principal repayments														30,141	27,780	24,109	22,220	15,071	13,890
Line of Credit Facility, Maximum Borrowing Capacity				2,000,000	1,800,000			1,600,000			1,700,000	1,200,000	1,100,000
Line of Credit Facility, Increase (Decrease), Net						542,505	500,000
Notes Payable, Current																									21,000
Repayments of Debt																								38,281
Dividends Payable, Current																								656,250
Agreed To Convert Of Preferred Stock For Common Stock																								1,750,000
Number Of Stock To Be Converted From Preferred Stock																								12,000
Line of Credit Facility, Current Borrowing Capacity																				$ 434,000	€ 400,000