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Significant Accounting Policies (Policies) | 6 Months Ended
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Jun. 30, 2019
Accounting Policies [Abstract] |
Basis of Accounting, Policy [Policy Text Block] | The unaudited condensed consolidated financial statements of Avalon and related notes included herein have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been omitted consistent with such rules and regulations. The accompanying unaudited condensed consolidated financial statements and related notes should be read in conjunction with the consolidated financial statements and related notes included in Avalon’s 2018 Annual Report to Shareholders. The unaudited condensed consolidated financial statements include the accounts of Avalon, its wholly owned subsidiaries and those companies in which Avalon has managerial control. All significant intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, these unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the financial position of Avalon as of June 30, 2019, and the results of its operations and cash flows for the interim periods presented. The operating results for the interim periods are not necessarily indicative of the results to be expected for the full year.

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- Definition Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). + References No definition available. + Details
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