Discontinued operations - Mexico project development- Narratives (Details) $ / shares in Units, gal in Millions							1 Months Ended					12 Months Ended
	Feb. 09, 2022 USD ($)	Feb. 09, 2022 MXN ($)	Aug. 28, 2020 USD ($)	Aug. 28, 2020 MXN ($)	Jun. 29, 2020	Aug. 22, 2016 gal	Sep. 30, 2021 MXN ($)	Feb. 28, 2014 USD ($)	May 31, 2013 USD ($) $ / shares	Feb. 29, 2012 USD ($)	May 31, 2010 gal	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2012 USD ($) ha	Feb. 28, 2018	Jan. 31, 2018	Aug. 31, 2016	Feb. 28, 2012
Schedule of Investments [Line Items]
Number of days to submit list of non-recoverable expenses made					20 days
Litigation Settlement, Expense		$ 137,000,000
Impairment loss on long-lived assets													$ 3,000,000.0
Impairment loss for Mexico assets - discontinued operations												$ 963,540	3,351,842
Payments For Option Exercised								$ 1,000,000.0
Share Price | $ / shares									$ 1
Minimum [Member]
Schedule of Investments [Line Items]
Loss Contingency, Damages Sought, Value	$ 51,000,000
Discontinued Operations | Mexico Project Development
Schedule of Investments [Line Items]
Impairment loss for Mexico assets - discontinued operations												$ 963,540	$ 316,217
Aguas de Rosarito S.A.P.I. de C.V [Member]
Schedule of Investments [Line Items]
Equity Method Investment, Ownership Percentage												50.00%
Option agreement [Member]
Schedule of Investments [Line Items]
Payments To Enter Option Agreement										$ 300,000
NSC Agua [Member]
Schedule of Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners															0.40%
Total Voting Interest Percentage After Conversion Of Loan									25.00%
Total Percentage Of Ownership Interest In An Acquired Company																99.99%
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal						100					100
Area of Land | ha														20.1
Equity Method Investment, Ownership Percentage												50.00%
Period in which construction must be completed						36 months
Period Required To Operate And Maintain Plant And Aqueduct						37 years
Payments for land and rights of way held for development														$ 21,100,000
Amount of non-recoverable expenses			$ 51,144,525	$ 137,333,114
Payments For Option Exercised								$ 1,000,000.0
Percentage of Voting Interest Acquired through Option Agreement																		25.00%
Guarantee amount required for suspension							$ 50,000
NSC Agua [Member] | Aguas de Rosarito S.A.P.I. de C.V [Member]
Schedule of Investments [Line Items]
Equity Method Investment, Ownership Percentage																	99.60%
NSC Agua [Member] | First Phase [Member]
Schedule of Investments [Line Items]
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal						50
NSC Agua [Member] | Second Phase [Member]
Schedule of Investments [Line Items]
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal						50
NSC Agua [Member] | Option agreement [Member]
Schedule of Investments [Line Items]
Total Voting Interest Percentage After Conversion Of Loan									99.99%
Repayment of inter-company loan payable									$ 5,700,000
Option Agreement Expiration Date										Feb. 07, 2014