Annual report pursuant to Section 13 and 15(d)

REVENUE - Disaggregation (Details)

v3.20.4
REVENUE - Disaggregation (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue disaggregation      
Revenues $ 208,938,247 $ 304,201,203 $ 290,732,049
Product      
Revenue disaggregation      
Revenues 49,390,126 170,566,047 178,580,286
Services      
Revenue disaggregation      
Revenues 103,898,798 69,389,272 38,779,350
Asset Management Solutions      
Revenue disaggregation      
Revenues 98,711,000 221,824,000 245,172,000
Asset Management Solutions | Product      
Revenue disaggregation      
Revenues 43,062,000 157,578,000 171,799,000
Asset Management Solutions | USM      
Revenue disaggregation      
Revenues 39,959,000 87,442,000 81,760,000
Asset Management Solutions | Whole Asset Sales      
Revenue disaggregation      
Revenues 3,103,000 70,136,000 90,039,000
Asset Management Solutions | Leasing      
Revenue disaggregation      
Revenues 55,649,000 64,246,000 73,373,000
Tech Ops      
Revenue disaggregation      
Revenues 110,227,000 82,377,000 45,560,000
Tech Ops | Product      
Revenue disaggregation      
Revenues 6,328,000 12,988,000 6,781,000
Tech Ops | USM      
Revenue disaggregation      
Revenues 2,364,000 5,489,000 4,516,000
Tech Ops | Engineered Solutions      
Revenue disaggregation      
Revenues 3,964,000 7,499,000 2,265,000
Tech Ops | Services      
Revenue disaggregation      
Revenues 103,899,000 69,389,000 38,779,000
Total      
Revenue disaggregation      
Revenues 208,938,000 304,201,000 290,732,000
Total | Product      
Revenue disaggregation      
Revenues 49,390,000 170,566,000 178,580,000
Total | USM      
Revenue disaggregation      
Revenues 42,323,000 92,931,000 86,276,000
Total | Whole Asset Sales      
Revenue disaggregation      
Revenues 3,103,000 70,136,000 90,039,000
Total | Engineered Solutions      
Revenue disaggregation      
Revenues 3,964,000 7,499,000 2,265,000
Total | Leasing      
Revenue disaggregation      
Revenues 55,649,000 64,246,000 73,373,000
Total | Services      
Revenue disaggregation      
Revenues $ 103,899,000 $ 69,389,000 $ 38,779,000