Note 8 - Advances from the Federal Home Loan Bank - Advances From the Federal Home Loan Bank (Details) (Parentheticals)	Mar. 31, 2020	Dec. 31, 2019
Minimum [Member]
Short-term advances from the FHLB, fixed rate	0.13%	0.13%
Long term advances from the FHLB, fixed rate	0.00%	0.00%
Maximum [Member]
Short-term advances from the FHLB, fixed rate	0.22%	0.22%
Long term advances from the FHLB, fixed rate	5.24%	5.24%

Rate of Federal Home Loan Bank (FHLB) advances which have fixed interest rates maturing in the next fiscal year following the latest fiscal year.

No definition available.

Name:	lmst_FederalHomeLoanBankInterestRateUnderOneYear
Namespace Prefix:	lmst_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant