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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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- Definition

The cash inflow from the additional capital contribution to the entity.

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- Definition

Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

+ References

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- Definition

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Nature of Business - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	2 Months Ended	12 Months Ended
	Mar. 13, 2020	Dec. 31, 2019	Jul. 29, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Nature of Business
Cash and cash equivalents		$ 11,033		$ 50,805	$ 41,799
Accumulated deficit		(376,177)		(317,171)
Stockholders’ deficit		(34,005)		$ 11,387	$ 1,340	$ 39,338
Term Loan Agreement [Member] \| CRG [Member]
Nature of Business
Minimum cash balance		5,000
Sales Agreement [Member] \| Canaccord [Member]
Nature of Business
Proceeds from issuance of common stock	$ 29,400	$ 6,700
Purchase Agreement [Member] \| Lincoln Park Capital Fund, LLC [Member] \| Minimum [Member]
Nature of Business
Stock price		$ 1.00	$ 1.00