7. Accrued liabilities (Details) - Accrued Liabilities Components (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accrued Liabilities Components [Abstract]
Salaries and compensation related	$ 1,852	$ 1,447
Warranty	207	282
Professional and consulting	959us-gaap_AccruedProfessionalFeesCurrent	139us-gaap_AccruedProfessionalFeesCurrent
Other	302us-gaap_OtherLiabilitiesCurrent	347us-gaap_OtherLiabilitiesCurrent
	$ 3,320us-gaap_AccruedLiabilitiesCurrent	$ 2,215us-gaap_AccruedLiabilitiesCurrent

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

+ References+ Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details