Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - 2000 Equity Plan (Details)

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Stockholders' Equity - 2000 Equity Plan (Details)
12 Months Ended
Mar. 31, 2018
shares
Stockholders' equity  
Assumed stock option forfeitures (in shares) 0
Stock options  
Stockholders' equity  
Vesting period 4 years
Expiration Term 10 years
Portion vesting one year after the issuance date (as a percent) 25.00%
Vesting period of awards after issuance date 1 year
Portion vesting on first day of each month after one year from the issuance date (as a percent) 2.083%
2000 Plan  
Stockholders' equity  
Number of shares of common stock reserved for issuance 1,849,000
2017 Plan  
Stockholders' equity  
Number of shares of common stock reserved for issuance 3,000,000
Number of shares available for future grant 1,058,703