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Stock-Based Awards - Summary of Restricted Stock Unit Activity (Detail) - 2017 Stock Incentive Plan [Member] - Restricted Stock Units [Member]
Mar. 31, 2020
$ / shares
shares
Units  
Beginning balance | shares 50,000
Ending balance | shares 50,000
Weighted-Average Grant Date per Unit  
Beginning balance | $ / shares $ 1.75
Ending balance | $ / shares $ 1.75