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Equity - Narrative (Details)
$ / shares in Units, $ in Millions
 9 Months Ended
Mar. 16, 2021
swap
shares
Sep. 30, 2021
$ / shares
shares
Aug. 16, 2021
USD ($)
Dec. 31, 2020
$ / shares
shares
Jul. 01, 2020
$ / shares
shares
Class of Stock          
Common stock, shares authorized (in shares)   250,000,000   250,000,000  
Common stock, shares issued (in shares)   36,674,000   35,928,000  
Common stock, shares outstanding (in shares)   36,674,000   35,928,000  
Common stock, par value (in dollars per share) | $ / shares   $ 0.001   $ 0.001  
Unvested options (in shares)   300,000      
Stock repurchase program, authorized amount | $     $ 25.0    
Increase in percentage points over lowest percentage of stock owned (more than) 0.50%        
Change in beneficial ownership, period 3 years        
Increase in number of shares that triggers Rights to not be exercisable (in shares) 1        
Stock acquisition, acquiring entity Flip-Over Event, exercisable common stock rights times exercise price | swap 2        
Stock acquisition, acquiring entity Flip-Over Event, transfer threshold of assets, cash flow or earning power, percent 5000.00%        
Series A Warrants          
Class of Stock          
Plan of reorganization, equity interest issuable (in shares)   4,900,000      
Number of common shares exercised for each warrant (in shares)   1      
Exercise price (in usd per share) | $ / shares   $ 41.34      
Series B Warrants          
Class of Stock          
Plan of reorganization, equity interest issuable (in shares)   2,100,000      
Number of common shares exercised for each warrant (in shares)   1      
Exercise price (in usd per share) | $ / shares   $ 42.03      
The Tax Benefits Preservation Plan          
Class of Stock          
Common stock, par value (in dollars per share) | $ / shares         $ 0.001
Number of rights per outstanding share of common stock         1
Preferred stock, par value (in dollars per share) | $ / shares         $ 0.001
Threshold for beneficial ownership declaration, percent 4.90%        
The Tax Benefits Preservation Plan | Preferred Stock          
Class of Stock          
Exercise price (in usd per share) | $ / shares         $ 5.00
Restricted Stock          
Class of Stock          
Unvested awards (in shares)   100,000      
Restricted Stock Units (RSUs)          
Class of Stock          
Unvested awards (in shares)   400,000