Annual report pursuant to Section 13 and 15(d)

Income Tax - Additional Information (Details)

v3.22.1
Income Tax - Additional Information (Details) - USD ($)
12 Months Ended
Jan. 02, 2022
Jan. 02, 2022
Dec. 31, 2020
Operating Loss Carryforwards [Line Items]      
Provision for income tax   $ 0 $ 0
Tax effected, loss carryovers, state $ 20,000,000.0 20,000,000.0  
Tax effected, loss carryovers, federal 47,700,000 47,700,000  
Unrecognized tax benefits, period increase (decrease)   0  
Interest expense   0 0
Accrued interest or penalties   0 $ 0
State [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 226,300,000 226,300,000  
Tax Credit Carryforwards Research 4,200,000 $ 4,200,000  
State [Member] | Minimum [Member]      
Operating Loss Carryforwards [Line Items]      
Loss carryforwards, expiration year   2028  
State [Member] | Maximum [Member]      
Operating Loss Carryforwards [Line Items]      
Loss carryforwards, expiration year   2041  
Federal [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 227,200,000 $ 227,200,000  
Tax Credit Carryforwards Research 5,900,000 $ 5,900,000  
Deferred federal losses expired $ 127,900,000    
Federal [Member] | Minimum [Member]      
Operating Loss Carryforwards [Line Items]      
Loss carryforwards, expiration year   2026  
Tax credit carryforward expiration year   2027  
Federal [Member] | Maximum [Member]      
Operating Loss Carryforwards [Line Items]      
Loss carryforwards, expiration year   2037  
Tax credit carryforward expiration year   2041