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Stockholders' Equity - Schedule of Restricted Stock Unit Activity (Detail) - Restricted Stock Unit [Member]
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]  
Number of Outstanding Restricted Stock Units, Beginning Balance | shares 7,677
Number of Outstanding Restricted Stock Units, Granted | shares 4,000
Number of Outstanding Restricted Stock Units, Released | shares (4,177)
Number of Outstanding Restricted Stock Units, Ending Balance | shares 7,500
Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares $ 5.32
Weighted Average Grant Date Fair Value, Granted | $ / shares 3.89
Weighted Average Grant Date Fair Value, Released | $ / shares 6.18
Weighted Average Grant Date Fair Value, Ending Balance | $ / shares $ 4.08