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ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ACCRUED LIABILITIES
Compensation and fringe benefits	$ 5,780	$ 9,696
Warranty reserve	758	786	629
Other accrued expenses	2,547us-gaap_OtherAccruedLiabilitiesCurrent	1,848us-gaap_OtherAccruedLiabilitiesCurrent
Accrued liabilities	$ 9,085us-gaap_AccruedLiabilitiesCurrent	$ 12,330us-gaap_AccruedLiabilitiesCurrent

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- 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).

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