Long-term Debts and Lines of Credit (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Long-term Debt, Gross	$ 3,424	$ 3,764
Hannoversech Volksbank Credit line 1 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	1,787	1,880
Hannoversech Volksbank Credit line 2 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	409	465
Hannoversech Volksbank term loan 1 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	93	135
Hannoversech Volksbank term loan 2 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	74	81
Hannoversech Volksbank term loan 3 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	226	270
Ventana Medical Systems, Inc. Promissory Note [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	21	21
Debenture DZ Equity Partners Participation rights
Line of Credit Facility [Line Items]
Long-term Debt, Gross	$ 814	$ 912