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Note 5 - Restructuring and Other Charges (Details Textual) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 19, 2021 | Jun. 10, 2021 | Jul. 19, 2020 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Operating Lease, Impairment Loss |  |  |  |  |  |  | $ 612 |  |  |  | $ 0 | $ 612
Incremental Sublease Income Above Impairment Charge | $ 350 |  | $ 350 |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  | $ 51 | $ 197 | $ 55 | 1,078 | $ 161 | $ 38 | $ 8 |  |
Severance and Other One-Time Termination Benefits [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  |  |  |  |  |  |  | 120 | 248
Other Restructuring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  |  |  |  |  |  |  | 183 | 173
EMS Segment Restructuring and Facility Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  |  | 903
Operating Lease, Impairment Loss |  |  |  |  |  |  |  |  |  |  | 522 |
EMS Segment Restructuring and Facility Consolidation [Member] | Severance and Other One-Time Termination Benefits [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | 69 |
Restructuring Charges, Total |  |  |  |  |  |  |  |  |  |  | 0 | 69
EMS Segment Restructuring and Facility Consolidation [Member] | Other Restructuring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | 159 |
Restructuring Charges, Total |  |  |  |  |  |  |  |  |  |  | 183 | 159
EMS Segment Restructuring and Facility Consolidation [Member] | Facility Closing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | 675 |
EMS Segment Restructuring and Facility Consolidation [Member] | Integration of Manufacturing Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | 183 |
Executive Management Changes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | 370 |
Operating Lease, Impairment Loss |  |  |  |  |  |  | $ 90 |  |  |  |  |
Restructuring Charges, Total |  |  |  |  |  |  |  |  |  |  |  | 514
Share-based Payment Arrangement, Reversal of Expense |  |  |  |  |  |  |  |  |  |  |  | 117
Executive Management Changes [Member] | Severance and Other One-Time Termination Benefits [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  |  |  |  |  |  |  | 120 | 133
Executive Management Changes [Member] | Other Restructuring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  |  |  |  |  |  |  | 0 | 0
Executive Management Changes [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  | $ 120 |  |  |  |  |  |  |  |  | 120 | 133
Executive Management Changes [Member] | Employee Severance [Member] | Restructuring and Other Charges [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | 120 |
Executive Management Changes [Member] | Legal Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | 159 | 381
Executive Management Changes [Member] | Facility Size Reduction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  |  |  |  | 99
Stock-based Compensation Expense [Member] | Modification Cost [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total |  |  |  |  |  |  |  |  |  |  | $ 91 |
Other Restructuring Actions [Member] | Headcount Reductions and Employee Relocation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  |  |  |  | 46
Other Restructuring Actions [Member] | Employee Relocation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  |  |  |  | $ 14

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- Definition Amount of loss from impairment of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 25 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123399704&loc=SL77918431-209957 + Details
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