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Note 1 - Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Revenue $ 27,410 $ 45,062
Facilities Segment [Member]    
Revenue 7,075 9,003
Facilities Segment [Member] | Maintenance [Member]    
Revenue 3,540 3,749
Facilities Segment [Member] | Equipment Sales [Member]    
Revenue 2,039 1,980
Facilities Segment [Member] | Deployment and Other Services [Member]    
Revenue 1,496 3,274
System Integration Services Segment [Member]    
Revenue 20,335 36,059
System Integration Services Segment [Member] | Integration Services [Member]    
Revenue 5,668 7,286
System Integration Services Segment [Member] | Procurement Services [Member]    
Revenue $ 14,667 $ 28,773