Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Apr. 04, 2019
Dec. 31, 2020
Income Tax [Line Items]    
Proceeds from sale of operating loss carryforwards and tax credits $ 512,000  
Net operating loss carryforward   $ 120,600,000
Net operating loss carryforward subject to expiration   98,900,000
Research and Development    
Income Tax [Line Items]    
Tax credit carryforward   1,800,000
State and Local Jurisdiction    
Income Tax [Line Items]    
Net operating losses sold   0
State and Local Jurisdiction | Research and Development    
Income Tax [Line Items]    
State research and development tax credits sold 72,000  
State and Local Jurisdiction | New Jersey Division of Taxation    
Income Tax [Line Items]    
Net operating losses sold $ 11,600,000  
Net operating loss carryforward   20,100,000
Foreign Tax Authority | Australian Taxation Office    
Income Tax [Line Items]    
Net operating loss carryforward   $ 3,700,000