Quarterly report pursuant to Section 13 or 15(d)

Uncategorized Items - ktra-10q_20211231.htm

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Label Element Value
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
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