Annual report pursuant to Section 13 and 15(d)

INTANGIBLE ASSETS - Estimated useful lives (Details)

v3.20.4
INTANGIBLE ASSETS - Estimated useful lives (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Intangible assets    
Total intangible assets with definite lives $ 18,034,000 $ 11,041,000
Asset Management Solutions | Qwest | Customer relationships    
Intangible assets    
Useful life (in years) 10 years  
Total intangible assets with definite lives $ 8,083,000 9,058,000
Tech Ops | ACS | Customer relationships    
Intangible assets    
Useful life (in years) 10 years  
Total intangible assets with definite lives $ 90,000 110,000
Tech Ops | Avborne Component Solutions | Customer relationships    
Intangible assets    
Useful life (in years) 10 years  
Total intangible assets with definite lives $ 1,663,000 $ 1,873,000
Tech Ops | ACT | Customer relationships    
Intangible assets    
Useful life (in years) 10 years  
Total intangible assets with definite lives $ 8,198,000