Stockholders' Equity - Additional Information (Detail)	6 Months Ended
Jun. 30, 2018 shares
Predecessor
Stockholders Equity [Line Items]
Common stock warrants exercised, Shares	363,638

Stock and warrants exercised during period shares preferred stock and warrants.

No definition available.

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