Annual report [Section 13 and 15(d), not S-K Item 405]

Segment Information (Schedule of Segment Information) (Details)

v3.26.1
Segment Information (Schedule of Segment Information) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Segment Reporting Information [Line Items]    
Sales $ 71,905,527 $ 56,861,753
Cost of sales 44,361,314 36,435,509
Gross profit 27,544,213 20,426,244
Selling, general and administrative expenses 26,979,750 27,054,166
Amortization expense 2,237,500 2,837,500
Fair value remeasurement of SUNation NY earnout consideration   (1,000,000)
Goodwill impairment loss   3,101,981
Intangible asset impairment loss 0 750,000
Total operating expenses 29,217,250 32,743,647
Operating (loss) income (1,673,037) (12,317,403)
Investment and other income 106,625 144,529
(Loss) gain on sale of assets   (822)
Fair value remeasurement of warrant (7,531,044) (974,823)
Fair value remeasurement of embedded derivative liability   (65,617)
Fair value remeasurement of contingent forward contract 899,080  
Fair value remeasurement of contingent value rights 36,079 522,257
Financing fees (1,294,090)  
Interest expense (1,041,835) (3,087,450)
Loss on debt extinguishment (343,471) (35,657)
Other expense, net (9,168,656) (3,497,583)
Net loss before income taxes (10,841,693) (15,814,986)
Depreciation and amortization 2,503,115 3,153,832
Capital expenditures 48,594 32,785
Assets 48,244,120 45,712,732
SUNation NY [Member]    
Segment Reporting Information [Line Items]    
Sales 49,600,311 39,733,362
Cost of sales 29,433,948 24,639,695
Gross profit 20,166,363 15,093,667
Selling, general and administrative expenses 16,237,256 15,265,443
Amortization expense 812,500 812,500
Total operating expenses 17,049,756 16,077,943
Operating (loss) income 3,116,607 (984,276)
Investment and other income 29,335 25,920
Interest expense (58,908) (74,507)
Other expense, net (29,573) (48,587)
Net loss before income taxes 3,087,034 (1,032,863)
Depreciation and amortization 995,472 1,031,418
Capital expenditures   24,155
Assets 27,437,628 26,127,816
HEC [Member]    
Segment Reporting Information [Line Items]    
Sales 22,305,216 17,128,391
Cost of sales 14,927,366 11,795,814
Gross profit 7,377,850 5,332,577
Selling, general and administrative expenses 4,766,477 4,530,879
Amortization expense 1,425,000 2,025,000
Goodwill impairment loss   3,101,981
Intangible asset impairment loss   750,000
Total operating expenses 6,191,477 10,407,860
Operating (loss) income 1,186,373 (5,075,283)
Investment and other income 13,044 17,742
(Loss) gain on sale of assets   6,118
Other expense, net 13,044 23,860
Net loss before income taxes 1,199,417 (5,051,423)
Depreciation and amortization 1,507,643 2,120,364
Capital expenditures 48,594 8,630
Assets 18,199,530 18,150,306
Corporate and Other [Member]    
Segment Reporting Information [Line Items]    
Selling, general and administrative expenses 5,976,017 7,257,844
Fair value remeasurement of SUNation NY earnout consideration   (1,000,000)
Total operating expenses 5,976,017 6,257,844
Operating (loss) income (5,976,017) (6,257,844)
Investment and other income 64,246 100,867
(Loss) gain on sale of assets   (6,940)
Fair value remeasurement of warrant (7,531,044) (974,823)
Fair value remeasurement of embedded derivative liability   (65,617)
Fair value remeasurement of contingent forward contract 899,080  
Fair value remeasurement of contingent value rights 36,079 522,257
Financing fees (1,294,090)  
Interest expense (982,927) (3,012,943)
Loss on debt extinguishment (343,471) (35,657)
Other expense, net (9,152,127) (3,472,856)
Net loss before income taxes (15,128,144) (9,730,700)
Depreciation and amortization   2,050
Assets $ 2,606,962 $ 1,434,610