Note 3 - Restructuring and Other Charges (Details Textual) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jun. 10, 2021	Sep. 30, 2021	Jun. 30, 2021
EMS Segment Restructuring and Facility Consolidation [Member]
Restructuring and Related Costs, Incurred Cost, Total			$ 132
EMS Segment Restructuring and Facility Consolidation [Member] | Minimum [Member] | Forecast [Member]
Restructuring and Related Costs, Incurred Cost, Total		$ 50
EMS Segment Restructuring and Facility Consolidation [Member] | Maximum [Member] | Forecast [Member]
Restructuring and Related Costs, Incurred Cost, Total		100
Executive Management Changes [Member]
Restructuring and Related Costs, Incurred Cost, Total			347
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			136
Executive Management Changes [Member] | Forecast [Member] | Consulting Fees [Member]
Restructuring and Related Costs, Incurred Cost, Total		$ 24
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