Quarterly report pursuant to Section 13 or 15(d)

Mandatorily Redeemable Series B Preferred Stock (Details)

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Mandatorily Redeemable Series B Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 28, 2020
Jun. 05, 2020
Sep. 30, 2020
Sep. 30, 2020
Jun. 05, 2019
Class of Stock [Line Items]          
Loss on redemption $ 4.7        
Warrants expiration period         7 years
Common stock issued for payment of series B preferred stock dividend (in shares)     300,000 900,000  
Amortization of discount     $ 0.4 $ 1.1  
Mandatorily Redeemable Preferred Stock          
Class of Stock [Line Items]          
Exercise price of warrants (in usd per share) $ 1.62        
Value of warrants issued with preferred stock $ 6.7        
Mandatory Redeemable Series B Preferred Stock          
Class of Stock [Line Items]          
Shares issued (in shares)         1,250,000
Number of shares in one unit         1
Preferred stock stated value (in usd per share)         $ 20.00
Aggregate purchase price, warrants         $ 25.0
Mandatory Redeemable Series B Preferred Stock | Mandatorily Redeemable Preferred Stock          
Class of Stock [Line Items]          
Number of securities called by each warrant (in shares)         7.41
Preferred stock dividend rate (percentage)   8.00%