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Note 14 - Segment Reporting - Segment Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Revenue $ 27,410 $ 45,062
Operating income (loss) (831) (400)
Depreciation expense 445 435
Interest expense 430 367
Total assets 19,281 23,808
Facilities Segment [Member]    
Revenue 7,075 9,003
Facilities Segment [Member] | Operating Segments [Member]    
Revenue 7,075 9,003
Operating income (loss) 499 1,207
Depreciation expense 208 181
Interest expense 251 196
Total assets 851 1,366
System Integration Services Segment [Member]    
Revenue 20,335 36,059
System Integration Services Segment [Member] | Operating Segments [Member]    
Revenue 20,335 36,059
Operating income (loss) (1,330) (1,607)
Depreciation expense 237 254
Interest expense 179 171
Total assets 3,178 2,072
Other Segments [Member] | Operating Segments [Member]    
Total assets $ 15,252 $ 20,370