Quarterly report pursuant to Section 13 or 15(d)

Short-term Investments - Schedule of Available for Sale Short-term Investments by Major Security Type (Details)

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Short-term Investments - Schedule of Available for Sale Short-term Investments by Major Security Type (Details) - Commercial Paper
$ in Thousands
Mar. 31, 2021
USD ($)
Schedule Of Available For Sale Securities [Line Items]  
Cost Total $ 33,920
Unrealized gains 2
Unrealized (losses) (54)
Fair Value Total 33,868
Maturity by period Less than 1 year 31,276
Maturity by period 1 to 5 years $ 2,592