Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Employee and Nonemployee Stock Option Activity (Details)

v3.20.2
Stock-Based Compensation - Summary of Employee and Nonemployee Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended 12 Months Ended
Jan. 02, 2020
Sep. 30, 2020
Dec. 31, 2019
Options Outstanding, Number of Shares Outstanding      
Outstanding, beginning balance (in shares)   64  
Granted (in shares) 20 20  
Canceled or expired (in shares)   (13)  
Outstanding, ending balance (in shares)   71 64
Exercisable (in shares)   59  
Options Outstanding, Weighted-Average Exercise Price      
Outstanding, beginning balance (usd per share)   $ 113.63  
Granted (usd per share) $ 5.53 5.53  
Cancelled or expired (usd per share)   109.42  
Outstanding, ending balance (usd per share)   83.90 $ 113.63
Exercisable (usd per share)   $ 98.42  
Weighted-Average Remaining Contractual Term and Aggregate Intrinsic Value      
Weighted- average remaining contractual term, outstanding (in years)   6 years 9 months 3 days 7 years 5 months 23 days
Weighted- average remaining contractual term, exercisable (in years)   6 years 4 months 17 days  
Aggregate intrinsic value, outstanding   $ 0 $ 24
Aggregate intrinsic value, exercisable   $ 0