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Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Less: debt - current, Principal	$ (2,568)
Less: debt - current, Unamortized Discount	45
Less: debt-current	(2,523)
Debt - non-current, Principal	17,432	$ 10,000
Debt - non-current, Unamortized Discount	(61)	(128)
Debt-non-current	17,371	9,872	[1]
Loan and Security Agreement
Debt Instrument [Line Items]
Total debt, Principal	20,000	10,000
Total debt, Unamortized amount	(106)	(128)
Total debt	$ 19,894	$ 9,872
[1] The financial information in this column was derived from audited consolidated financial statements included in the Company's 2014 Annual Report on Form 10-K.

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Current portion carrying value of the debt instrument before deducting unamortized discounts (if any).

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Non-current portion carrying value of the debt instrument before deducting unamortized discounts (if any).

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Current portion of the unamortized discounts on the debt instrument.

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Non-current portion of the unamortized discounts on the debt instrument.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

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