Note 6 - Equity	12 Months Ended
Dec. 31, 2020
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	6. Equity In July 2015, the Company's Board of Directors authorized the Company, from time to time and depending on market conditions, to repurchase up to $25.0 million of the Company's outstanding common stock. During the years ended December 31, 2020 and 2019, the Company did not repurchase any shares under the existing authorization. In February 2018, the Company's Board of Directors adopted a tax benefits preservation plan (the "Plan") designed to protect and preserve the Company's ability to utilize its net operating loss carryforwards ("NOLs") which was ratified by shareholders at its 2018 Annual Meeting of Shareholders. The purpose of the Plan was to preserve the Company's ability to use its NOLs, which would be substantially limited if the Company experienced an "ownership change" as defined under Section 382 of the Internal Revenue Code. In general, an ownership change would occur if the Company's shareholders who are treated as owning five percent or more of the outstanding shares of Safeguard for purposes of Section 382 ("five-percent shareholders") collectively increase their aggregate ownership in the Company's overall shares outstanding by more than 50 percentage points. Whether this change has occurred would be measured by comparing each five-percent shareholder's current ownership as of the measurement date to such shareholders' lowest ownership percentage during the three-year period preceding the measurement date. To protect the Company's NOLs from being limited or permanently lost under Section 382, the Plan was intended to deter any person or group from acquiring beneficial ownership of 4.99% or more of the Company's outstanding common stock without the approval of the Board, reducing the likelihood of an unintended ownership change. Under the Plan, the Company would issue one preferred stock purchase right (the "Rights") for each share of Safeguard's common stock held by shareholders of record on March 2, 2018. The issuance of the Rights would not be taxable to Safeguard or its shareholders and would not affect Safeguard's reported earnings per share. The Rights would have traded with Safeguard's common shares and would have expired no later than February 19, 2021. Accordingly, the Plan has now expired. On November 7, 2019, the Board of Directors declared a special cash dividend of $1.00 per share, payable on December 30, 2019 to shareholders of record as of the close of business on December 23, 2019, resulting in total dividends paid of $20.7 million.

Note 6 - Equity

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note Disclosure [Text Block]

6. Equity

In July 2015, the Company's Board of Directors authorized the Company, from time to time and depending on market conditions, to repurchase up to $25.0 million of the Company's outstanding common stock. During the years ended December 31, 2020 and 2019, the Company did not repurchase any shares under the existing authorization.

In February 2018, the Company's Board of Directors adopted a tax benefits preservation plan (the "Plan") designed to protect and preserve the Company's ability to utilize its net operating loss carryforwards ("NOLs") which was ratified by shareholders at its 2018 Annual Meeting of Shareholders. The purpose of the Plan was to preserve the Company's ability to use its NOLs, which would be substantially limited if the Company experienced an "ownership change" as defined under Section 382 of the Internal Revenue Code. In general, an ownership change would occur if the Company's shareholders who are treated as owning five percent or more of the outstanding shares of Safeguard for purposes of Section 382 ("five-percent shareholders") collectively increase their aggregate ownership in the Company's overall shares outstanding by more than 50 percentage points. Whether this change has occurred would be measured by comparing each five-percent shareholder's current ownership as of the measurement date to such shareholders' lowest ownership percentage during the three-year period preceding the measurement date. To protect the Company's NOLs from being limited or permanently lost under Section 382, the Plan was intended to deter any person or group from acquiring beneficial ownership of 4.99% or more of the Company's outstanding common stock without the approval of the Board, reducing the likelihood of an unintended ownership change. Under the Plan, the Company would issue one preferred stock purchase right (the "Rights") for each share of Safeguard's common stock held by shareholders of record on March 2, 2018. The issuance of the Rights would not be taxable to Safeguard or its shareholders and would not affect Safeguard's reported earnings per share. The Rights would have traded with Safeguard's common shares and would have expired no later than February 19, 2021. Accordingly, the Plan has now expired.

On November 7, 2019, the Board of Directors declared a special cash dividend of $1.00 per share, payable on December 30, 2019 to shareholders of record as of the close of business on December 23, 2019, resulting in total dividends paid of $20.7 million.