Note 13 - Commitments and Contingencies	12 Months Ended
Dec. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	13. COMMITMENTS AND CONTINGENCIES Litigation The Company is involved in certain litigation incidental to the conduct of its business and affairs. Management, after consultation with legal counsel, does not believe that the outcome of any such litigation, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial condition, results of operations or cash flows. Purchase Commitments The Company had no material purchase commitments at December 31, 2020. Guarantees The Company has many contracts that require the Company to indemnify the other party against loss from claims, including claims of patent or trademark infringement or other third party claims for injuries, damages or losses. The Company has agreed to indemnify its surety against losses from third-party claims of subcontractors. The Company has not previously experienced material losses under these provisions and, while there can be no assurances, currently does not anticipate any future material adverse impact on its consolidated financial position, results of operations or cash flows. The Company regularly reviews its exposure under all its engagements, including performance guarantees by contractual joint ventures and indemnification of its surety. As a result of the most recent review, the Company has determined that the risk of material loss is remote under these arrangements and has not recorded a liability for these risks at December 31, 2020 on its consolidated balance sheet. Retirement Plans Approximately 948 of our U.S. employees participate in multi-employer retirement plans. Substantially all of the Company’s remaining U.S. employees are eligible to participate in one of the Company’s sponsored defined contribution savings plans, which are qualified plans under the requirements of Section 401(k) of the Internal Revenue Code. Company contributions to the domestic plans were $3.0 million, $5.2 million and $5.7 million for the years ended December 31, 2020, 2019 and 2018, respectively. From April 2020 to November 2020, the Company suspended Company contributions to increase liquidity and improve financial flexibility in light of COVID-19. Certain foreign subsidiaries maintain various other defined contribution retirement plans. Company contributions to such plans for the years ended December 31, 2020, 2019 and 2018 were $0.3 million, $0.8 million and $1.1 million, respectively. In connection with the Company’s 2009 acquisition of Corrpro, the Company assumed an obligation associated with a contributory defined benefit pension plan sponsored by a subsidiary of Corrpro located in the United Kingdom. Employees of this Corrpro subsidiary no longer accrue benefits under the plan; however, Corrpro continues to be obligated to fund prior period benefits. Both the pension expense and funding requirements for the years ended December 31, 2020, 2019 and 2018 were immaterial to the Company’s consolidated financial position and results of operations. The plan assets and benefit obligation at December 31, 2020 were approximately $10.2 million and $9.5 million, respectively. The Company used a discount rate of 1.3% for the evaluation of the pension liability. The Company recorded an asset associated with the overfunded status of this plan of approximately $0.7 million, which is included in other long-term assets on the consolidated balance sheet. The plan assets and benefit obligation at December 31, 2019 approximated $9.1 million and $8.2 million, respectively. Plan assets consist of investments in equity and debt securities as well as cash, which are primarily Level 2 inputs as defined in Note 2.

Note 13 - Commitments and Contingencies

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Text Block]

13. COMMITMENTS AND CONTINGENCIES

Litigation

The Company is involved in certain litigation incidental to the conduct of its business and affairs. Management, after consultation with legal counsel, does not believe that the outcome of any such litigation, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial condition, results of operations or cash flows.

Purchase Commitments

The Company had no material purchase commitments at December 31, 2020.

Guarantees

The Company has many contracts that require the Company to indemnify the other party against loss from claims, including claims of patent or trademark infringement or other third party claims for injuries, damages or losses. The Company has agreed to indemnify its surety against losses from third-party claims of subcontractors. The Company has not previously experienced material losses under these provisions and, while there can be no assurances, currently does not anticipate any future material adverse impact on its consolidated financial position, results of operations or cash flows.

The Company regularly reviews its exposure under all its engagements, including performance guarantees by contractual joint ventures and indemnification of its surety. As a result of the most recent review, the Company has determined that the risk of material loss is remote under these arrangements and has not recorded a liability for these risks at December 31, 2020 on its consolidated balance sheet.

Retirement Plans

Approximately 948 of our U.S. employees participate in multi-employer retirement plans. Substantially all of the Company’s remaining U.S. employees are eligible to participate in one of the Company’s sponsored defined contribution savings plans, which are qualified plans under the requirements of Section 401(k) of the Internal Revenue Code. Company contributions to the domestic plans were $3.0 million, $5.2 million and $5.7 million for the years ended December 31, 2020, 2019 and 2018, respectively. From April 2020 to November 2020, the Company suspended Company contributions to increase liquidity and improve financial flexibility in light of COVID-19.

Certain foreign subsidiaries maintain various other defined contribution retirement plans. Company contributions to such plans for the years ended December 31, 2020, 2019 and 2018 were $0.3 million, $0.8 million and $1.1 million, respectively.

In connection with the Company’s 2009 acquisition of Corrpro, the Company assumed an obligation associated with a contributory defined benefit pension plan sponsored by a subsidiary of Corrpro located in the United Kingdom. Employees of this Corrpro subsidiary no longer accrue benefits under the plan; however, Corrpro continues to be obligated to fund prior period benefits. Both the pension expense and funding requirements for the years ended December 31, 2020, 2019 and 2018 were immaterial to the Company’s consolidated financial position and results of operations. The plan assets and benefit obligation at December 31, 2020 were approximately $10.2 million and $9.5 million, respectively. The Company used a discount rate of 1.3% for the evaluation of the pension liability. The Company recorded an asset associated with the overfunded status of this plan of approximately $0.7 million, which is included in other long-term assets on the consolidated balance sheet. The plan assets and benefit obligation at December 31, 2019 approximated $9.1 million and $8.2 million, respectively. Plan assets consist of investments in equity and debt securities as well as cash, which are primarily Level 2 inputs as defined in Note 2.