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Wofford Water Service, Inc. [Member] Wofford Water Service, Inc. 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[Member] Intercoastal Trading, Inc. [Member] Intercoastal Trading, Inc. 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Summary of Inventories Schedule of Inventory, Current [Table Text Block] Assets, Current [Abstract] Assets, Current [Abstract] Goodwill Goodwill Goodwill Shares surrendered for payroll taxes Payroll taxes paid in exchange for shares withheld Payment, Tax Withholding, Share-Based Payment Arrangement Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Inventories Inventory Disclosure [Text Block] Share Repurchase Program Equity [Text Block] Equity Component [Domain] Equity Component [Domain] Segment Information Segment Reporting Disclosure [Text Block] Current portion of long-term debt Less: current portion of long-term debt Long-Term Debt, Current Maturities Water Guard, Inc. Water Guard, Inc. [Member] Water Guard, Inc. 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