Preferred Stock Warrants and Common Stock Warrants - Warrants Outstanding - Additional Information (Details)	May 07, 2018
Common stock warrants issued on July 1, 2012
Class of Warrant or Right [Line Items]
Shares issuable percentage (as a percent)	12.50%

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.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration