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Nexperia Arrangement (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
Jul. 16, 2021
Apr. 04, 2018
Jun. 30, 2020
Dec. 31, 2019
Oct. 31, 2019
Apr. 30, 2019
Jan. 31, 2019
Oct. 31, 2018
Jul. 31, 2019
Jun. 30, 2021
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2018
May 18, 2021
Mar. 01, 2021
Mar. 31, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
License fees   $ 9,000,000 $ 5,000,000   $ 3,000,000 $ 3,000,000   $ 3,000,000       $ 9,000,000.0        
Revenue from product and license fees                   $ 3,216,000 $ 6,329,000          
License and Service                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Revenue from product and license fees                   0 $ 5,000,000.0          
Subsequent Event | License and Service                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Revenue from product and license fees $ 8,000,000                              
Series 3 Preferred Stock                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Issuance of preferred stock   16,000,000                            
Tranche A Loan                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Long-term loan facility   5,000,000.0                            
Reduction of debt     $ 5,000,000                          
Proceeds from issuance of debt             $ 5,000,000                  
Tranche B Loan                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Long-term loan facility   10,000,000             $ 8,000,000.0           $ 10,000,000 $ 8,000,000
Proceeds from issuance of debt                 $ 8,000,000              
Tranche B Loan | Subsequent Event                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Repayment of Nexperia debt 8,000,000.0                              
Tranche C Loan                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Revolving loan   $ 10,000,000                         $ 10,000,000  
Proceeds from issuance of debt                         $ 10,000,000      
Tranche B-1 Loan                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Long-term loan facility       $ 2,000,000.0           $ 12,200,000       $ 2,000,000   $ 2,000,000
Proceeds from issuance of debt       $ 2,000,000                        
Tranche B-1 Loan | Subsequent Event                                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                
Repayment of Nexperia debt $ 8,000,000