Note 12 - Stock Plans and Stock Based Compensation - Unrecognized Stock Based Compensation Expense Related to Unvested Shares (Details) $ in Thousands	Mar. 31, 2020 USD ($)
April 2020 – December 2020	$ 305
2021	311
2022	136
2023	$ 14

The expected future compensation expense related to unvested shares for the remainder of the fiscal year.

No definition available.

Name:	lmst_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpectedFutureCompensationRemainderOfYear
Namespace Prefix:	lmst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant