REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 15,401,035	$ 16,754,771
Relative Percentage	100.00%	100.00%
CEA
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 4,408,958	$ 5,049,330
Relative Percentage	29.00%	30.00%
Commercial
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 10,992,077	$ 11,705,441
Relative Percentage	71.00%	70.00%
Equipment systems
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 2,508,287	$ 2,905,035
Relative Percentage	16.00%	17.00%
Equipment systems | CEA
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 2,508,287	$ 2,905,035
Equipment systems | Commercial
Disaggregation of Revenue [Line Items]
Total revenues and other income	0	0
Services
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 3,133,793	$ 3,470,653
Relative Percentage	20.00%	21.00%
Services | CEA
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 867,907	$ 1,577,026
Services | Commercial
Disaggregation of Revenue [Line Items]
Total revenues and other income	2,265,886	1,893,627
Construction design-build
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 9,683,814	$ 10,195,338
Relative Percentage	63.00%	61.00%
Construction design-build | CEA
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 957,623	$ 383,524
Construction design-build | Commercial
Disaggregation of Revenue [Line Items]
Total revenues and other income	8,726,191	9,811,814
Other
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 75,141	$ 183,745
Relative Percentage	0.00%	1.00%
Other | CEA
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 75,141	$ 183,745
Other | Commercial
Disaggregation of Revenue [Line Items]
Total revenues and other income	$ 0	$ 0