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Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt, Principal	$ 17,631
Less: debt-current	(5,548)	$ (6,934)
Debt-non-current	11,914	12,441
Cerus Term Loans
Debt Instrument [Line Items]
Total debt, Principal	17,631	19,499
Total debt, Unamortized Discount	(169)	(124)
Total debt	17,462	19,375
Less: debt - current, Principal	(5,674)	(7,013)
Less: debt - current, Unamortized Discount	126	79
Less: debt-current	(5,548)	(6,934)
Debt - non-current, Principal	11,957	12,486
Debt - non-current, Unamortized Discount	(43)	(45)
Debt-non-current	$ 11,914	$ 12,441

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- Definition

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

+ References

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- Definition

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

+ References

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- Definition

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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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, after accumulated amortization, of debt discount.

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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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