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Common Stock Reserved for Future Issuance (Details) - shares	Mar. 31, 2017	Mar. 31, 2016
Stockholders' equity
Shares reserved for future issuance (in shares)	4,229,689	3,513,436
Common stock warrants
Stockholders' equity
Shares reserved for future issuance (in shares)	24,566	36,084
Stock options
Stockholders' equity
Shares reserved for future issuance (in shares)	3,681,464	3,141,868
Employee Stock Purchase Plan
Stockholders' equity
Shares reserved for future issuance (in shares)	523,659	335,484

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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