Restricted cash (Details Textual) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Weighted Average Rate Foreign Deposit, Time Deposit	0.01%	0.00%
Restricted Cash Held In Escrow [Member]
Restricted Cash and Cash Equivalents, Current	$ 1,000
Bank Guarantees For Sales Contracts With Various Hospitals And Health Authorities [Member]
Restricted Cash and Cash Equivalents, Current	1,158	0
Value Added Tax Liabilities [Member]
Restricted Cash and Cash Equivalents, Current	$ 165	$ 0

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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