Financial Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Current liability	$ 1,760	$ 884	[1]
Non-current liability	4,118	1,189	[1]
Total	5,878	2,073
Equipment financing liabilities
Debt Instrument [Line Items]
Current liability	547
Non-current liability	2,019
Bank loan
Debt Instrument [Line Items]
Current liability	325
Non-current liability	1,383
Debt note
Debt Instrument [Line Items]
Current liability	835	829
Non-current liability		423
Mortgage loan payable to bank
Debt Instrument [Line Items]
Current liability	53	55
Non-current liability	$ 716	$ 766

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2011 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.