Amount available for borrowing under long term debt agreement.

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Contract with customers expected period of payment to be received.

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Minimum age approved for vaccine prevention of infection caused.

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Organization consolidation and presentation of financial statements disclosure.

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Tax cuts and jobs act of 2017 provisional amounts expected measurement period.

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount of cash outflow for fees classified as other.

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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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Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	6 Months Ended
	Nov. 30, 2017	Jun. 30, 2018 USD ($) Segment	Jun. 30, 2017 USD ($)	Feb. 28, 2018 USD ($)	Feb. 20, 2018 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of operating segment \| Segment		1
Cash, cash equivalents and marketable securities		$ 216,000,000
Maximum borrowing capacity				$ 175,000,000
Cash used in operating activities		63,799,000	$ 42,642,000
Impairment of Intangible assets		$ 0
Federal corporate income tax rate		21.00%
Maximum
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Expected period of payment to be received		1 year
Provisional amounts expected measurement period		1 year
Patent License Agreements
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Paid fees under patent license agreements		$ 9,500,000
CRG Servicing LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Maximum borrowing capacity					$ 175,000,000
Current borrowing capacity					100,000,000
Additional borrowing capacity					$ 75,000,000
HEPLISAV-B®
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Minimum age approved for vaccine prevention of infection caused	18 years