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Pay vs Performance Disclosure
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Pay vs Performance Disclosure          
Pay vs Performance Disclosure, Table
Year
​ ​
Summary
Compensation
Table Total
for PEO
$
​ ​
Compensation
Actually
Paid to PEO(1)
$
​ ​
Average
Summary
Compensation
Table Total
for Non-PEO
NEOs
$
​ ​
Average
Compensation
Actually Paid
to Non-PEO
NEOs(1)
$
​ ​ ​ ​ ​
Value of Initial
Fixed $100
Investment
Based on:
​ ​
Net
Income
$
 ​ ​
Revenue
(excluding
pass-through
energy
charges)
$
 ​
​ ​ ​ ​
Total
Shareholder
Return(2)
$
​ ​
Peer Group
Total
Shareholder
Return
$
​
2024
​ ​ ​ ​ 1,462,458 ​ ​ ​ ​ ​ 1,075,367 ​ ​ ​ ​ ​ 624,907 ​ ​ ​ ​ ​ 506,457 ​ ​ ​ ​ ​ ​ ​ ​ 177.01 ​ ​ ​ ​ ​ 107.41 ​ ​ ​ ​ ​ 28,237,554 ​ ​ ​ ​ ​ 115,370,773 ​ ​
2023
​ ​ ​ ​ 1,446,075 ​ ​ ​ ​ ​ 2,546,547 ​ ​ ​ ​ ​ 594,319 ​ ​ ​ ​ ​ 928,037 ​ ​ ​ ​ ​ ​ ​ ​ 239.88 ​ ​ ​ ​ ​ 130.40 ​ ​ ​ ​ ​ 29,585,391 ​ ​ ​ ​ ​ 160,644,059 ​ ​
2022
​ ​ ​ ​ 1,331,100 ​ ​ ​ ​ ​ 1,547,295 ​ ​ ​ ​ ​ 545,100 ​ ​ ​ ​ ​ 609,988 ​ ​ ​ ​ ​ ​ ​ ​ 97.91 ​ ​ ​ ​ ​ 118.72 ​ ​ ​ ​ ​ 5,856,294 ​ ​ ​ ​ ​ 76,196,354 ​ ​
2021
​ ​ ​ ​ 907,150 ​ ​ ​ ​ ​ 841,379 ​ ​ ​ ​ ​ 453,865 ​ ​ ​ ​ ​ 434,564 ​ ​ ​ ​ ​ ​ ​ ​ 68.57 ​ ​ ​ ​ ​ 123.24 ​ ​ ​ ​ ​ 875,579 ​ ​ ​ ​ ​ 55,182,474 ​ ​
2020
​ ​ ​ ​ 906,312 ​ ​ ​ ​ ​ 717,932 ​ ​ ​ ​ ​ 446,006 ​ ​ ​ ​ ​ 392,276 ​ ​ ​ ​ ​ ​ ​ ​ 75.49 ​ ​ ​ ​ ​ 100.22 ​ ​ ​ ​ ​ 3,711,528 ​ ​ ​ ​ ​ 63,143,379 ​ ​
​
(1)
Compensation Actually Paid represents total compensation as reported in the Summary Compensation Table for that year (i) less the grant-date fair value of any stock and option awards granted during that year, (ii) plus the change in fair value of outstanding and unvested stock and option awards during that year, as well as the fair value of new stock and option awards granted during that year as of the end of the year.
​
(2)
The Value of Initial Fixed $100 Investment Based on Total Shareholder Return depicts a hypothetical $100 investment in Ordinary Shares on December 31, 2019, and shows the value of that investment over time (assuming the reinvestment of dividends) for each calendar year. Historical stock performance is not necessarily indicative of future stock performance.
       
PEO Total Compensation Amount $ 1,462,458 $ 1,446,075 $ 1,331,100 $ 907,150 $ 906,312
PEO Actually Paid Compensation Amount 1,075,367 2,546,547 1,547,295 841,379 717,932
Non-PEO NEO Average Total Compensation Amount 624,907 594,319 545,100 453,865 446,006
Non-PEO NEO Average Compensation Actually Paid Amount $ 506,457 928,037 609,988 434,564 392,276
Tabular List, Table
Tabular List of the Company’s Most Important Metrics that Link Compensation Actually Paid to the PEO and other NEOs
We consider the list below to be the Company’s most important metrics that link compensation paid to our NEOs, as they are the key metrics that determine the payout under our short-term incentive compensation plan and long-term incentive compensation plan.
•
Revenue (excluding pass-through energy charges)
​
•
Net income from continuing operations
​
•
Gross margin
​
•
Earnings per share
​
•
Operating cash flows
       
Total Shareholder Return Amount $ 177.01 239.88 97.91 68.57 75.49
Peer Group Total Shareholder Return Amount 107.41 130.4 118.72 123.24 100.22
Net Income (Loss) $ 28,237,554 $ 29,585,391 $ 5,856,294 $ 875,579 $ 3,711,528
Company Selected Measure Amount 115,370,773 160,644,059 76,196,354 55,182,474 63,143,379
PEO Name Mr. McTaggart        
Measure:: 1          
Pay vs Performance Disclosure          
Name Revenue (excluding pass-through energy charges)        
Measure:: 2          
Pay vs Performance Disclosure          
Name Net income from continuing operations        
Measure:: 3          
Pay vs Performance Disclosure          
Name Gross margin        
Measure:: 4          
Pay vs Performance Disclosure          
Name Earnings per share        
Measure:: 5          
Pay vs Performance Disclosure          
Name Operating cash flows