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Note 12 - Leases (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Lease, Balance Sheet Classification [Table Text Block]

(in thousands)			2020				2019
Assets:
Other noncurrent assets (a)		$	918			$	1,178
Liabilities:
Accrued and other current liabilities			507				529
Noncurrent operating lease liabilities			411				649
Total liabilities		$	918			$	1,178

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

		Amount
Maturities:
2021		$	524
2022			202
2023			132
2024 and 2025			116
Total lease payments			974
Adjust to present value			(56	)
Total operating lease liabilities		$	918

X

- Definition

Tabular disclosure of balance sheet classification of leases.

+ References

No definition available.

+ Details

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Namespace Prefix:	mrtn_
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Balance Type:	na
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- Definition

Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

+ Details

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Period Type:	duration

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- References

No definition available.

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Data Type:	xbrli:stringItemType
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Period Type:	duration