Post-effective amendment to a registration statement that is not immediately effective upon filing

BUSINESS SEGMENTS - Selected financial information (Details)

v3.21.1
BUSINESS SEGMENTS - Selected financial information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segments      
Revenue from contract with customer $ 208,938,247 $ 304,201,203 $ 290,732,049
Revenues 208,938,247 304,201,000 290,732,000
Gross profit 52,789,145 85,048,759 72,168,805
Total assets 389,129,692 343,984,256  
Depreciation and amortization 24,222,907 30,080,936 29,826,222
Product      
Segments      
Revenue from contract with customer 49,390,126 170,566,047 178,580,286
Services      
Segments      
Revenue from contract with customer 103,898,798 69,389,272 38,779,350
Asset Management Solutions      
Segments      
Revenue from contract with customer 98,711,000 221,824,000 245,172,000
Asset Management Solutions | Product      
Segments      
Revenue from contract with customer 43,062,000 157,578,000 171,799,000
Asset Management Solutions | Whole asset sales      
Segments      
Revenues 53,639,000 98,736,000 95,353,000
Gross profit 11,914,000 27,592,000 21,708,000
Asset Management Solutions | Engine      
Segments      
Revenues 45,072,000 123,088,000 149,819,000
Gross profit 17,383,000 40,113,000 41,949,000
Tech Ops      
Segments      
Revenue from contract with customer 110,227,000 82,377,000 45,560,000
Tech Ops | Product      
Segments      
Revenue from contract with customer 6,328,000 12,988,000 6,781,000
Revenues 6,328,000 12,988,000 6,781,000
Gross profit 1,609,000 6,219,000 1,694,000
Tech Ops | Services      
Segments      
Revenue from contract with customer 103,899,000 69,389,000 38,779,000
Tech Ops | MRO services      
Segments      
Revenues 103,899,000 69,389,000 38,779,000
Gross profit 21,883,000 11,125,000 6,818,000
Total      
Segments      
Gross profit 52,789,000 85,048,759 72,168,805
Corporate      
Segments      
Total assets 3,492,000 1,531,000  
Operating segments      
Segments      
Depreciation and amortization 24,222,907 30,080,936 29,826,222
Operating segments | Asset Management Solutions      
Segments      
Gross profit 29,297,000 67,705,000  
Total assets 277,016,000 254,324,000  
Depreciation and amortization 21,210,000 28,579,000 27,611,000
Operating segments | Asset Management Solutions | Product      
Segments      
Revenues 98,711,000 221,824,000 245,172,000
Operating segments | Tech Ops      
Segments      
Revenues 110,227,000 82,377,000 45,560,000
Gross profit 23,492,000 17,344,000 8,512,000
Total assets 108,622,000 88,129,000  
Depreciation and amortization 2,600,000 1,301,000 865,000
Operating segments | Total      
Segments      
Gross profit     63,657,000
Operating segments | Corporate      
Segments      
Depreciation and amortization $ 413,000 $ 201,000 $ 1,350,000