XML 68 R52.htm IDEA: XBRL DOCUMENT v3.20.4
Debts - Additional Information (Details)
1 Months Ended 12 Months Ended
Feb. 12, 2020
shares
$ / shares
Dec. 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
Apr. 04, 2018
USD ($)
Oct. 31, 2017
USD ($)
Line of Credit Facility [Line Items]                
Aggregate principal amount of loans outstanding   $ 35,901,000   $ 35,901,000        
Accrued interest on promissory note       150,000 $ 150,000      
Outstanding balance on line of credit facility   10,200,000   10,200,000 10,500,000      
Changes in fair value of promissory note       (927,000) 167,000      
Maximum number of shares of common stock issuable (in shares) | shares 3,076,171              
Conversion price per share on convertible note payable (in dollars per share) | $ / shares $ 5.12              
Interest expense       $ 760,000 758,000      
Term of cooperation and development agreement.       3 years        
Deferred revenue   674,000   $ 674,000 0      
Accounts Payable and Accrued Liabilities                
Line of Credit Facility [Line Items]                
Interest expense       915,000 496,000      
Yaskawa                
Line of Credit Facility [Line Items]                
Letter of intent for development activities   4,000,000.0 $ 4,000,000.0          
Proceeds from Collaborators   1,000,000.0            
Deferred revenue   667,000   667,000        
Loan and Security Agreement (LSA)                
Line of Credit Facility [Line Items]                
Long-term loan facility             $ 15,000,000.0  
Aggregate principal amount of loans outstanding   $ 10,000,000.0   10,000,000.0 15,000,000      
Tranche A Loan                
Line of Credit Facility [Line Items]                
Long-term loan facility             5,000,000.0  
Tranche B Loan                
Line of Credit Facility [Line Items]                
Long-term loan facility           $ 8,000,000.0 10,000,000  
Tranche B-1 Loan                
Line of Credit Facility [Line Items]                
Long-term loan facility           $ 2,000,000.0    
Tranche C Note                
Line of Credit Facility [Line Items]                
Long-term loan facility             10,000,000.0  
Revolving loan             $ 10,000,000.0  
Interest rate per annum             6.00%  
Accrued interest on promissory note       $ 610,000 608,000      
Yaskawa Note                
Line of Credit Facility [Line Items]                
Interest rate per annum   1.00%   1.00%       1.00%
Changes in fair value of promissory note       $ 927,000 (167,000)      
Unsecured subordinated convertible promissory note   $ 15,486,000   15,486,000 15,336,000     $ 15,000,000.0
Maximum number of shares of common stock issuable (in shares) | shares 3,076,171              
Interest expense       150,000 150,000      
Accrued interest on promissory note   $ 486,000   $ 486,000 $ 336,000