Stockholders' Equity - Warrants - Additional Information (Detail)	9 Months Ended
Dec. 31, 2017 $ / shares
Class Of Stock [Line Items]
Weighted-average remaining contractual term of options exercisable	5 years 1 month 7 days
Minimum [Member]
Class Of Stock [Line Items]
Warrants exercisable price, per share	$ 6.84
Maximum [Member]
Class Of Stock [Line Items]
Warrants exercisable price, per share	$ 7.62
Warrants [Member]
Class Of Stock [Line Items]
Weighted-average remaining contractual term of options exercisable	1 year 5 months 16 days

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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