Quarterly report pursuant to Section 13 or 15(d)

Uncategorized Items - ktra-10q_20210930.htm

v3.21.2
Label Element Value
Series C Warrants [Member] | Issuance Of Preferred Series C2 Warrants [Member]  
Class Of Warrant Or Right Outstanding us-gaap_ClassOfWarrantOrRightOutstanding 219
Class Of Warrant Or Right Outstanding us-gaap_ClassOfWarrantOrRightOutstanding 219
Series C Warrants [Member] | Issuance Of Preferred Series C1 Warrants [Member]  
Class Of Warrant Or Right Outstanding us-gaap_ClassOfWarrantOrRightOutstanding 1,929
Class Of Warrant Or Right Outstanding us-gaap_ClassOfWarrantOrRightOutstanding 1,929
Series C Warrants [Member] | Issuance Of Preferred Series C3 Warrants [Member]  
Class Of Warrant Or Right Outstanding us-gaap_ClassOfWarrantOrRightOutstanding 296
Class Of Warrant Or Right Outstanding us-gaap_ClassOfWarrantOrRightOutstanding 296