Note 7 - Subordinated Debentures Issued to Capital Trusts	3 Months Ended
Mar. 31, 2021
Subordinated Debentures Issued to Capital Trusts [Member]
Notes to Financial Statements
Subordinated Borrowings Disclosure [Text Block]	Note 7: Subordinated Debentures Issued to Capital Trusts During 2005, the Company formed two wholly owned grantor trust subsidiaries, Guaranty Statutory Trust I and Guaranty Statutory Trust II, to issue preferred securities representing undivided beneficial interests in the assets of the trusts and to invest the gross proceeds of the preferred securities in notes of the Company. Trust I issued $5,000,000 of preferred securities and Trust II issued $10,000,000 of preferred securities. The sole assets of Trust I were originally $5,155,000 aggregate principal amount of the Company’s fixed rate subordinated debenture notes due 2036, which were redeemable beginning in 2011. The sole assets of Trust II were originally $10,310,000 aggregate principal amount of the Company’s fixed/variable rate subordinated debenture notes due 2036, which were redeemable beginning in 2011. Trust II subordinated debenture notes bear interest at a fixed rate for five years and thereafter at a floating rate based on LIBOR. The preferred securities qualify as either Tier I or Tier II capital for regulatory purposes, subject to certain limitations. See Note 14: “Subsequent Events” for additional information regarding the full redemption of the $5,155,000 Trust I assets which will occur in May 2021.

Note 7 - Subordinated Debentures Issued to Capital Trusts

3 Months Ended

Mar. 31, 2021

Subordinated Debentures Issued to Capital Trusts [Member]

Subordinated Borrowings Disclosure [Text Block]

Note 7: Subordinated Debentures Issued to Capital Trusts

During 2005, the Company formed two wholly owned grantor trust subsidiaries, Guaranty Statutory Trust I and Guaranty Statutory Trust II, to issue preferred securities representing undivided beneficial interests in the assets of the trusts and to invest the gross proceeds of the preferred securities in notes of the Company. Trust I issued $5,000,000 of preferred securities and Trust II issued $10,000,000 of preferred securities. The sole assets of Trust I were originally $5,155,000 aggregate principal amount of the Company’s fixed rate subordinated debenture notes due 2036, which were redeemable beginning in 2011. The sole assets of Trust II were originally $10,310,000 aggregate principal amount of the Company’s fixed/variable rate subordinated debenture notes due 2036, which were redeemable beginning in 2011. Trust II subordinated debenture notes bear interest at a fixed rate for five years and thereafter at a floating rate based on LIBOR. The preferred securities qualify as either Tier I or Tier II capital for regulatory purposes, subject to certain limitations. See Note 14: “Subsequent Events” for additional information regarding the full redemption of the $5,155,000 Trust I assets which will occur in May 2021.