Quarterly report pursuant to Section 13 or 15(d)

Description of Stock Plans - Summary of RSU Activity (Details)

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Description of Stock Plans - Summary of RSU Activity (Details) - Restricted Stock Units (RSUs) - $ / shares
1 Months Ended 9 Months Ended
May 31, 2020
May 31, 2019
Jun. 30, 2018
Dec. 31, 2020
Number of Shares        
Unvested, beginning balance (in shares)       293,525
Granted (in shares) 109,034 109,416 232,558 109,034
Vested (in shares)       (77,321)
Cancelled (in shares)       0
Unvested, ending balance (in shares)       325,238
Weighted-Average Grant Date Fair Value        
Unvested weighted average grant date fair value, beginning balance (in dollars per share)       $ 2.48
Granted (in dollars per share)       6.42
Vested (in dollars per share)       2.49
Cancelled (in dollars per share)       0
Unvested weighted average grant date fair value, ending balance (in dollars per share)       $ 3.91