Note 10 - Equity Investment	12 Months Ended
Dec. 31, 2021
Notes to Financial Statements
Business Combination Disclosure [Text Block]	10. Equity Investment We owned a 45% equity interest in MWL, a third-party provider of logistics services to the transportation industry, until October 31, 2019, at which time we sold our entire membership interest for approximately $1.3 million. Prior to the sale of our interest, a non-related party owned the other 55% equity interest in MWL. We accounted for our ownership interest in MWL under the equity method of accounting. We received $2.2 million of our revenue for loads transported by our tractors and arranged by MWL for the first ten months of 2019.

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-URI http://asc.fasb.org/topic&trid=2303972

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