Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	May 10, 2017	Apr. 04, 2017	Mar. 31, 2017	Mar. 31, 2016
Subsequent Event [Line Items]
Common stock, shares authorized (in shares)			75,000,000	75,000,000
Minimum
Subsequent Event [Line Items]
Expected severance cost			$ 1.5
Maximum
Subsequent Event [Line Items]
Expected severance cost			$ 2.0
Subsequent event
Subsequent Event [Line Items]
Number of positions eliminated, period percent		8.00%
Common Stock
Subsequent Event [Line Items]
Issuance of stock (in shares)			380,000	4,000,000
Common Stock | Subsequent event
Subsequent Event [Line Items]
Issuance of stock (in shares)	4,000,000.0
Sale of stock, price per share (in dollars per share)	$ 4.00
Proceeds from additional equity offering	$ 14.7
Over-allotment options, expiration period	30 days
Over-allotment option | Common Stock | Subsequent event
Subsequent Event [Line Items]
Common stock, shares authorized (in shares)	600,000