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v3.20.2

Note 2 - Revenue Recognition - Revenues By Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member] | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Grid [Member] | EPC Services Company [Member] |  |  |  |
Concentration risk percentage | 12.00% | 0.00% | 18.00% | 0.00%
Grid [Member] | Hoffman Construction [Member] |  |  |  |
Concentration risk percentage | 10.00% | 25.00% | 10.00% | 12.00%
Grid [Member] | M.J. Electric, LLC [Member] |  |  |  |
Concentration risk percentage | 10.00% | 25.00% | 10.00% | 13.00%
Grid [Member] | Micron Technology [Member] |  |  |  |
Concentration risk percentage | 10.00% | 10.00% | 10.00% | 14.00%
Grid [Member] | Reed & Reed Inc. [Member] |  |  |  |
Concentration risk percentage | 25.00% | 0.00% | 12.00% | 0.00%
Grid [Member] | Siemens Gamesa Renewable Energy [Member] |  |  |  |
Concentration risk percentage | 10.00% | 0.00% | 13.00% | 0.00%
Wind [Member] | Inox Wind Limited [Member] |  |  |  |
Concentration risk percentage | 10.00% | 10.00% | 10.00% | 17.00%

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