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Note 3 - Acquisitions - Consideration (Details) - USD ($) | Nov. 12, 2019 | Aug. 08, 2019 | Apr. 01, 2019
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Astero [Member] |  |  |
Cash consideration |  |  | $ 12,521,000
Contingent consideration |  |  | 1,491,000
Working capital adjustment |  |  | (71,000)
Total consideration transferred |  |  | $ 13,941,000
SAVSU [Member] |  |  |
Stock consideration |  | $ 19,932,000 |
CBS Acquisition [Member] |  |  |
Cash consideration | $ 11,000,000 |  |
Contingent consideration | 856,000 |  |
Total consideration transferred | 15,856,000 |  |
Stock consideration | $ 4,000,000 |  |

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