Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Fair Value Measurement - Fair Value Measurement on a Recurring Basis (Details)

v3.21.2
Note 7 - Fair Value Measurement - Fair Value Measurement on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Sep. 25, 2021
Jun. 26, 2021
Mar. 27, 2021
Prefunded warrants liability $ 0 $ 1,657 $ 0
Fair Value, Inputs, Level 1 [Member]      
Prefunded warrants liability 0 0 0
Fair Value, Inputs, Level 2 [Member]      
Prefunded warrants liability 0 0 0
Fair Value, Inputs, Level 3 [Member]      
Prefunded warrants liability $ 0 $ 1,657 $ 0