Business Combination - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	6 Months Ended
	Oct. 31, 2015	Sep. 30, 2016	Mar. 31, 2016
Business Acquisition [Line Items]
Preliminary purchase price allocation, goodwill		$ 11,828	$ 11,828
Opsmatic, Inc.
Business Acquisition [Line Items]
Purchase consideration paid in cash	$ 5,500
Number of shares issued to acquire capital stock (in shares)	161,116
Business acquisition, aggregate purchase price	$ 12,300
Preliminary purchase price allocation, goodwill	$ 9,800
Business acquisition obligation to issue common stock (in shares)	98,115
Common stock, aggregate grant date fair value	$ 3,800
Service period of compensation expense	30 months
Number of common stock shares issued (in shares)		59,687
Number of common stock shares issued, subject to repurchase (in shares)		42,996
Opsmatic, Inc. | Technology
Business Acquisition [Line Items]
Preliminary purchase price allocation, identifiable intangible assets	$ 2,500
Opsmatic, Inc. | Restricted Stock Units
Business Acquisition [Line Items]
Number of shares issued to acquire capital stock (in shares)	12,008
Fair value of shares issued to acquire capital stock (in usd per share)	$ 39.15