Bank Debts and Lines of Credit (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Line of Credit Facility [Line Items]
Long-term Debt, Gross	$ 3,874	$ 4,310
Hannoversech Volksbank Credit line 1 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	1,880	2,092
Hannoversech Volksbank Credit line 2 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	465	444
Hannoversech Volksbank term loan 1 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	135	211
Hannoversech Volksbank term loan 2 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	81	138
Hannoversech Volksbank term loan 3 [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	270	393
Ventana Medical Systems, Inc. Promissory Note [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	21	0
Related party advances [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	110	0
DZ Equity Partners Participation rights [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	$ 912	$ 1,032