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Note 7 - Fair Value Measurements - Non-Recurring Fair Value Measurements (Details) - Fair Value, Nonrecurring [Member] | Mar. 31, 2020 USD ($)
--- | ---
Long-lived assets held and used (1) | $ 1,771,450 | [1]
Total | 1,771,450 |
Fair Value, Inputs, Level 1 [Member] |  |
Long-lived assets held and used (1) |  | [1]
Total |  |
Fair Value, Inputs, Level 2 [Member] |  |
Long-lived assets held and used (1) |  | [1]
Total |  |
Fair Value, Inputs, Level 3 [Member] |  |
Long-lived assets held and used (1) | 1,771,450 | [1]
Total | $ 1,771,450 |
[1] | At March 31, 2020, the Company performed an impairment review of the tubular segment's pipe finishing facility that resulted in the assets being written down to their estimated fair value of $1,771,450.

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