Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.22.4
Summary of Significant Accounting Policies - Additional Information (Details)
 1 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
Jan. 01, 2023
USD ($)
segment
$ / shares
shares
Jan. 02, 2022
USD ($)
Dec. 31, 2020
USD ($)
Dec. 05, 2021
$ / shares
Jul. 31, 2021
$ / shares
shares
Class of Warrant or Right [Line Items]            
Working capital   $ 306,600,000        
Accumulated deficit   $ (384,774,000) $ (333,152,000)      
Number of operating segments | segment   1        
Restricted cash included in prepaid expenses and other current assets   $ 125,000 125,000 $ 75,000    
Estimated useful life   5 years        
Impairment of equipment [1]   $ 4,921,000 0 0    
Revenue   6,202,000 0 $ 0    
Deferred revenue   3,800,000 7,900,000      
Deferred contract cost   800,000 4,600,000      
Research And Development Cost Reimbursement            
Class of Warrant or Right [Line Items]            
Financial assistance $ 6,500,000          
Financial assistance receivable   $ 400,000 $ 300,000      
Government Assistance, Current, Statement of Financial Position [Extensible Enumeration]   Prepaid expenses and other current assets Prepaid expenses and other current assets      
Government Assistance, Expenses Reimbursed, Percentage   49.80%        
Government Assistance, Expenses Paid By Company, Percentage   50.20%        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-02            
Class of Warrant or Right [Line Items]            
Remaining performance obligation, percentage   1.00%        
Expected timing of satisfaction, period   12 months        
Service            
Class of Warrant or Right [Line Items]            
Revenue   $ 6,200,000        
Minimum            
Class of Warrant or Right [Line Items]            
Term of service revenue contracts   1 year        
Term of product warranties   1 year        
Maximum            
Class of Warrant or Right [Line Items]            
Term of service revenue contracts   3 years        
Term of product warranties   3 years        
Customer A            
Class of Warrant or Right [Line Items]            
Revenue   $ 5,000,000        
Revenue Benchmark | Customer Concentration Risk | Customer A            
Class of Warrant or Right [Line Items]            
Concentration risk, percentage   81.00%        
Revenue Benchmark | Customer Concentration Risk | Customer C            
Class of Warrant or Right [Line Items]            
Concentration risk, percentage   14.00%        
Accounts Receivable | Customer Concentration Risk | Customer C            
Class of Warrant or Right [Line Items]            
Concentration risk, percentage   84.00%        
Deferred Revenue. | Customer Concentration Risk | Customer A            
Class of Warrant or Right [Line Items]            
Concentration risk, percentage   0.00% 64.00%      
Deferred Revenue. | Customer Concentration Risk | Customer B            
Class of Warrant or Right [Line Items]            
Concentration risk, percentage   92.00% 29.00%      
RSUs | Minimum            
Class of Warrant or Right [Line Items]            
Vesting period   4 years        
RSUs | Maximum            
Class of Warrant or Right [Line Items]            
Vesting period   5 years        
Performance Restricted Stock Units            
Class of Warrant or Right [Line Items]            
Vesting period   2 years        
Stock options outstanding            
Class of Warrant or Right [Line Items]            
Contractual term   10 years        
Stock options outstanding | Minimum            
Class of Warrant or Right [Line Items]            
Vesting period   4 years        
Stock options outstanding | Maximum            
Class of Warrant or Right [Line Items]            
Vesting period   5 years        
Common Stock Warrants            
Class of Warrant or Right [Line Items]            
Warrants outstanding (in shares) | shares           17,500,000
Contractual term   5 years        
Outstanding public warrant redemption price (in dollars per share) | $ / shares   $ 0.01        
Warrant redemption condition minimum share price (in dollars per share) | $ / shares   $ 18.00        
Private Placement Warrants            
Class of Warrant or Right [Line Items]            
Warrants outstanding (in shares) | shares   6,000,000       6,000,000
Exercise price of warrants (in dollars per share) | $ / shares         $ 11.50 $ 11.50
[1] As of January 1, 2023, $1.7 million of the $4.9 million impairment of equipment was recorded as accrued expenses on the Consolidated Balance Shee