Stockholders' Equity - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Feb. 02, 2021
Jan. 29, 2021
Aug. 31, 2020
Sep. 30, 2019
Jan. 01, 2022
Jan. 02, 2021
Jan. 01, 2021
Nov. 04, 2020
Nov. 03, 2020
Dec. 28, 2019
Shareholders Equity [Line Items]                    
Common stock, shares authorized (in shares)         200,000,000 200,000,000        
Number of common stock returned to the company     71,607              
Common Stock, par value         $ 0.001 $ 0.001        
Gross proceeds reimbursement for accountable legal expenses   $ 420,000                
Share based compensation, value         $ 303,000 $ 578,000        
Common stock, issued shares (in shares)         2,827,410 1,829,982        
Common stock, outstanding shares (in shares)         2,827,410 1,829,982        
Options outstanding         117,500 113,900       44,400
Warrants outstanding         0 33,363 33,363      
Warrant exercise price         $ 3.40 $ 3.40        
Warrants Expiration Date         2021-11          
Stock Options                    
Shareholders Equity [Line Items]                    
Share-based compensation expense         $ 303,000,000 $ 173,000,000        
Unrecognized compensation expense, net of estimated forfeitures         $ 5,000,000          
2016 Plan                    
Shareholders Equity [Line Items]                    
Options expiration date         Oct. 28, 2026          
Increased number of shares of common stock reserved for issuance               800,000 400,000  
Options outstanding         90,000 78,000        
2011 Plan                    
Shareholders Equity [Line Items]                    
Options expiration date         May 12, 2021          
Options outstanding         27,500 35,900        
Additional awards to be granted after adoption of 2016 plan         0          
Common Stock                    
Shareholders Equity [Line Items]                    
Share-based compensation, shares           33,191        
Share-based compensation expense         $ 0 $ 54,000,000        
Common Stock | Equity Offering [Member]                    
Shareholders Equity [Line Items]                    
Common stock, shares authorized (in shares)   571,428                
Common Stock, par value   $ 0.001                
Common Stock Purchase Price Per Share   $ 10.50                
Common stock gross proceeds before deducting placement agent fees and offering expenses $ 6,000,000.0                  
Common Stock | Equity Offering [Member] | Private Placement [Member]                    
Shareholders Equity [Line Items]                    
Percentage of cash fee gross proceeds   7.00%                
Common Stock | Maximum [Member] | Equity Offering [Member] | Private Placement [Member]                    
Shareholders Equity [Line Items]                    
Gross proceeds reimbursement for accountable legal expenses   $ 35,000                
Contractor                    
Shareholders Equity [Line Items]                    
Stock issued for services, shares       223,214 104,798          
Stock issued for services, value       $ 1,000,000.0 $ 351,000,000          
Articles of Incorporation                    
Shareholders Equity [Line Items]                    
Common stock, shares authorized (in shares)           200,000,000