Note 5 - Restructuring and Other Charges (Details Textual) - USD ($) $ in Thousands			12 Months Ended
	Jul. 19, 2021	Jun. 10, 2021	Dec. 31, 2021	Dec. 31, 2022	Jan. 01, 2021	Dec. 31, 2020
Incremental Sublease Income Above Impairment Charge	$ 350
Restructuring Reserve, Ending Balance			$ 70	$ 0		$ 340
EMS Segment Restructuring and Facility Consolidation [Member]
Restructuring Reserve, Ending Balance			0	0		233
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
Restructuring Reserve, Ending Balance			70	$ 0		$ 107
Executive Management Changes [Member] | Employee Severance [Member]
Restructuring and Related Costs, Incurred Cost, Total		$ 120	120
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
Executive Management Changes [Member] | Subletting Costs of the Mansfield MA Facility [Member]
Restructuring Reserve, Ending Balance					$ 70
Stock-based Compensation Expense [Member] | Modification Cost [Member]
Restructuring and Related Costs, Incurred Cost, Total			$ 91