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Stock Plans and Stock Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 31, 2021
shares
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2022
USD ($)
plan
purchase_period
$ / shares
shares
Jun. 30, 2021
$ / shares
Dec. 31, 2016
purchase_period
Dec. 31, 2021
shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Number of shareholder-approved, share-based compensation plans | plan     2      
Granted (in shares)     4,694,350      
Weighted average grant-date fair values of stock options (in dollars per share) | $ / shares     $ 2.57 $ 9.42    
Unrecognized compensation cost, net of estimated forfeitures | $   $ 16.3 $ 16.3      
Unrecognized compensation cost, weighted average period for recognition     2 years 7 months 20 days      
Intrinsic values of employee stock options exercised | $     $ 0.0      
Outstanding shares (in shares)   0 0      
Restricted Stock            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Vesting period (years)     4 years      
Awarded (in shares)     0      
Outstanding shares (in shares)   0 0     10,312
Restricted Stock | Officer            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Awarded (in shares)     605,550      
Amended and Restated 2010 Stock Incentive Plan            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Shares authorized (in shares) 23,190,000          
Number of shares under award to be removed from share pool     9,829,897      
Amended and Restated 2010 Stock Incentive Plan | Employee Stock            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Additional shares authorized under the plan (in shares) 11,000,000          
Amended and Restated 2010 Stock Incentive Plan | Stock Options, or Stock Appreciation Rights            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Period of time options are exercisable 10 years          
Shares removed from pool (in shares per share) 1          
Amended and Restated 2010 Stock Incentive Plan | Restricted Stock, RSUs, Other Stock-Based Awards, or Performance Awards            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Shares removed from pool (in shares per share) 1.3          
Price charged for award based on fair market value percentage (less than) 100.00%          
2010 Plan            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Granted (in shares)     3,663,800      
2010 Plan | Non-Employee Directors            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Granted (in shares)     425,000      
Vesting period (years)     1 year      
2010 Plan | Tranche One            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Percentage of vested shares which are exercisable under stock option     25.00%      
2010 Plan | Tranche Two            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Percentage of vested shares which are exercisable under stock option     6.25%      
Employee Stock Purchase Plan            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Issuance of stock under Employee Stock Purchase Plan (in shares)   169,296 169,296      
Employee Stock Purchase Plan | Employee Stock            
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]            
Shares authorized (in shares)   2,000,000 2,000,000      
Price charged for award based on fair market value percentage (less than)     85.00%      
Enrollment period     2 years      
Number of purchase periods per year | purchase_period     4   2  
Term of purchase periods     6 months   6 months  
Shares available for future purchase under ESPP (in shares)   1,384,234 1,384,234