2019 Retention Plan (Details) - 2019 Retention Plan - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
	Jul. 03, 2019	Jun. 30, 2020	Jul. 31, 2019
2019 Retention Plan
Cash portion of the retention plan			$ 0.3
Options granted In January 2019 | Vesting on January 29, 2020
2019 Retention Plan
Percentage of options to vest	50.00%
Options granted In January 2019 | Vesting on June 30, 2020
2019 Retention Plan
Percentage of options to vest	25.00%
Options granted In January 2019 | Vesting on December 31, 2020
2019 Retention Plan
Percentage of options to vest	25.00%
Options granted in July 2019
2019 Retention Plan
Stock option exercise price (in dollars per share)		$ 1.48
Options granted in July 2019 | Vesting on July 3, 2020
2019 Retention Plan
Percentage of options to vest		50.00%
Options granted in July 2019 | Vesting on December 31, 2020
2019 Retention Plan
Percentage of options to vest		50.00%