Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.10.0.1
Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - At Market Issuance Sales Agreement [Member] - Stifel [Member]
$ in Millions
Aug. 02, 2018
USD ($)
shares
Subsequent Event [Line Items]  
Common stock to be issued under sales agreement, aggregate value maximum | $ $ 35.0
Number of shares sold under sales agreement | shares 0