Organization and Description of Business (Details) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2017 USD ($) $ / shares shares	Jan. 31, 2018 USD ($) Provider shares	Jan. 31, 2017 USD ($)	Jan. 31, 2016 USD ($) shares
Class of Stock [Line Items]
Number of service and application providers | Provider		150
Proceeds from initial public offering, net of underwriting discounts and commissions		$ 123,527	$ 0	$ 0
Issuance costs		$ 4,263	$ 170	$ 0
Common Stock
Class of Stock [Line Items]
Shares issued (in shares) | shares		12,075,000		5,895,000
IPO
Class of Stock [Line Items]
Proceeds from initial public offering, net of underwriting discounts and commissions	$ 123,500
Issuance costs	$ 4,400
IPO | Common Stock
Class of Stock [Line Items]
Shares issued (in shares) | shares	12,075,000
Shares issued, price per share (in dollars per share) | $ / shares	$ 11
Common Stock
Class of Stock [Line Items]
Conversion of preferred stock (in shares) | shares	43,594,753