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Contingencies (Details Textual) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Apr. 30, 2019 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Commitments And Contingencies [Line Items] |  |  |  |
Cayman Water Retail Operations, Percentage Of Gross Profit |  | 56.00% | 59.00% |
Cayman Water Retail Operations, Percentage Of Revenue |  | 39.00% | 44.00% |
WSC [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Accounts Receivable, Net |  | $ 16.9 |  | $ 17.6
Subsequent Event [Member] | Consolidated Water Bahamas [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Accounts Receivable, Net | $ 11.6 |  |  |
Increase (Decrease) in Accounts Receivable | $ 7.4 |  |  |

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