Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Details)

v3.8.0.1
Subsequent Events - Additional Information (Details) - Subsequent Events - Common Stock - Initial Public Offering
$ / shares in Units, $ in Millions
May 03, 2018
USD ($)
$ / shares
shares
Subsequent Event [Line Items]  
Stock issued during period of shares 2,300,000
Stock issued, price per share | $ / shares $ 21.00
Common stock option to purchase additional shares by underwriters 300,000
Proceeds from offering, net of underwriting discounts and offering expenses payable | $ $ 42.6