Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2020
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 2019 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 March 31, 2020, 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. We expect the effects of the coronavirus/COVID- 19 pandemic (collectively referred to herein as "COVID- 19" ) to adversely impact our financial position, results of operations, and cash flows in fiscal year 2020. The unaudited Condensed Consolidated Financial Statements presented herein reflect our current estimates and assumptions that affect the reported amounts of assets and liabilities and related disclosures as of the date of the financial statements and reported amounts of revenues and expenses during the reporting periods presented. Due to the ongoing uncertainty, we cannot predict the future impact that COVID- 19 may have on our financial condition, results of operations or cash flows.

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

2019

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

March 31, 2020,

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.

We expect the effects of the coronavirus/COVID-

pandemic (collectively referred to herein as "COVID-

19"

) to adversely impact our financial position, results of operations, and cash flows in fiscal year

2020.

The unaudited Condensed Consolidated Financial Statements presented herein reflect our current estimates and assumptions that affect the reported amounts of assets and liabilities and related disclosures as of the date of the financial statements and reported amounts of revenues and expenses during the reporting periods presented. Due to the ongoing uncertainty, we cannot predict the future impact that COVID-

may

have on our financial condition, results of operations or cash flows.