Consolidated Water (CWCO) 10-K 31 Mar 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 26, 2021	Jun. 30, 2020
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	0-25248
Entity Registrant Name	CONSOLIDATED WATER CO. LTD.
Entity Incorporation, State or Country Code	KY
Entity Tax Identification Number	98-0619652
Entity Address, Address Line One	Regatta Office Park
Entity Address, Address Line Two	Windward Three, 4th Floor, West Bay Road
Entity Address, Address Line Three	P.O. Box 1114
Entity Address, City or Town	Grand Cayman
Entity Address, Postal Zip Code	KY1-1102
Entity Address, Country	KY
City Area Code	345
Local Phone Number	945-4277
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Trading Symbol	CWCO
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		15,169,687
Entity Central Index Key	0000928340
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Public Float			$ 207,036,890

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 43,794,150	$ 42,071,083
Accounts receivable, net	21,483,976	22,953,659
Inventory	3,214,178	3,287,555
Prepaid expenses and other current assets	2,412,282	1,559,448
Contract assets	516,521	1,677,041
Current assets of discontinued operations	1,511,099	1,619,056
Total current assets	72,932,206	73,167,842
Property, plant and equipment, net	57,687,984	61,238,752
Construction in progress	440,384	1,335,597
Inventory, noncurrent	4,506,842	4,404,378
Investment in OC-BVI	2,092,146	1,903,602
Goodwill	13,325,013	13,325,013
Intangible assets, net	4,148,333	5,040,000
Operating lease right-of-use assets	1,329,561	1,811,516
Other assets	1,926,594	2,120,708
Long-term assets of discontinued operations	21,166,489	27,669,966
Total assets	179,555,552	192,017,374
Current liabilities
Accounts payable, accrued expenses and other current liabilities	2,856,127	3,503,561
Accounts payable - related parties	200,558	57,410
Accrued compensation	1,434,106	1,821,395
Dividends payable	1,300,022	1,292,187
Current maturities of operating leases	455,788	688,540
Current portion of long-term debt	42,211	17,753
Contract liabilities	461,870	339,616
Current liabilities of discontinued operations	188,434	178,382
Total current liabilities	6,939,116	7,898,844
Long-term debt, noncurrent	126,338	61,146
Deferred tax liabilities	1,440,809	1,529,035
Noncurrent operating leases	982,076	1,156,543
Net liability arising from put/call options	690,000	664,000
Other liabilities	362,165	75,000
Long-term liabilities of discontinued operations	2,499	2,679,932
Total liabilities	10,543,003	14,064,500
Commitments and contingencies
Consolidated Water Co. Ltd. stockholders' equity
Redeemable preferred stock, $0.60 par value. Authorized 200,000 shares; issued and outstanding 31,068 and 33,751 shares, respectively	18,641	20,251
Additional paid-in capital	86,893,486	88,356,509
Retained earnings	64,910,709	66,352,733
Total Consolidated Water Co. Ltd. stockholders' equity	160,909,046	163,759,258
Non-controlling interests	8,103,503	14,193,616
Total equity	169,012,549	177,952,874
Total liabilities and equity	179,555,552	192,017,374
Common Class A [Member]
Consolidated Water Co. Ltd. stockholders' equity
Common stock value	9,086,210	9,029,765
Common Class B [Member]
Consolidated Water Co. Ltd. stockholders' equity
Common stock value	$ 0	$ 0

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Redeemable preferred stock, par value (in dollars per share)	$ 0.60	$ 0.60
Redeemable preferred stock, authorized	200,000	200,000
Redeemable preferred stock, issued	31,068	33,751
Redeemable preferred stock, outstanding	31,068	33,751
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.60	$ 0.60
Common stock, authorized	24,655,000	24,655,000
Common stock, issued	15,143,683	15,049,608
Common stock, outstanding	15,143,683	15,049,608
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.60	$ 0.60
Common stock, authorized	145,000	145,000
Common stock, issued	0	0

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF INCOME
Total revenue	$ 72,628,126	$ 68,793,651
Total cost of revenue	45,859,671	40,519,303
Gross profit	26,768,455	28,274,348
General and administrative expenses	18,434,898	17,001,164
Gain on asset dispositions and impairments, net	13,997	445,041
Income from operations	8,347,554	11,718,225
Other income (expense):
Interest income	540,096	588,509
Interest expense	(9,669)	(1,332)
Profit-sharing income from OC-BVI	135,675	16,200
Equity in the earnings of OC-BVI	371,019	44,765
Net unrealized gain (loss) on put/call options	(26,000)	56,000
Other	71,825	82,410
Other income, net	1,082,946	786,552
Income before income taxes	9,430,500	12,504,777
Provision for income taxes	86,724	66,621
Net income from continuing operations	9,343,776	12,438,156
Income from continuing operations attributable to non-controlling interests	730,005	1,549,978
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	8,613,771	10,888,178
Gain on sale of discontinued operations	0	3,621,170
Net loss from discontinued operations	(4,902,243)	(2,333,255)
Total income (loss) from discontinued operations	(4,902,243)	1,287,915
Net income attributable to Consolidated Water Co. Ltd. stockholders	$ 3,711,528	$ 12,176,093
Basic earnings (loss) per common share attributable to Consolidated Water Co. Ltd. common stockholders
Continuing operations	$ 0.56	$ 0.72
Discontinued operations	(0.32)	0.09
Basic earnings (loss) per share	0.24	0.81
Diluted earnings (loss) per common share attributable to Consolidated Water Co. Ltd. common stockholders
Continuing operations	0.56	0.72
Discontinued operations	(0.32)	0.08
Diluted earnings (loss) per share	0.24	0.80
Dividends declared per common and redeemable preferred shares	$ 0.34	$ 0.34
Weighted average number of common shares used in the determination of:
Basic earnings per share	15,119,305	15,025,639
Diluted earnings per share	15,223,955	15,137,076

CONSOLIDATED STATEMENTS OF IN_2

CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF INCOME
Total cost of revenue (including purchases from related parties of $1,349,331 in 2020 and $10,295 in 2019)	$ 1,349,331	$ 10,295

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Redeemable preferred stock [Member]	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Cumulative translation adjustment [Member]	Non controlling interests [Member]	Total
Balance at Dec. 31, 2018	$ 20,878	$ 8,989,744	$ 87,211,953	$ 59,298,161	$ (549,555)	$ 8,784,722	$ 163,755,903
Balance (in shares) at Dec. 31, 2018	34,796	14,982,906
Issuance of share capital	$ 4,376	$ 35,683	(40,059)	0	0	0	0
Issuance of share capital (in shares)	7,293	59,472
Conversion of preferred stock	$ (4,338)	$ 4,338	0	0	0	0	0
Conversion of preferred stock (in shares)	(7,230)	7,230
Buyback of preferred stock	$ (1,605)	$ 0	(22,491)	0	0	0	(24,096)
Buyback of preferred stock (in shares)	(2,674)	0
Net income	$ 0	$ 0	0	12,176,093	0	1,549,978	13,726,071
Exercise of options	$ 940	$ 0	14,882	0	0	0	15,822
Exercise of options (in shares)	1,566	0
Dividends declared	$ 0	$ 0	0	(5,121,521)	0	0	(5,121,521)
PERC non-controlling interest at acquisition date	0	0	0	0	0	3,617,634	3,617,634
Sale of CW-Bali	0	0	0	0	549,555	241,282	790,837
Stock-based compensation	0	0	1,192,224	0	0	0	1,192,224
Balance at Dec. 31, 2019	$ 20,251	$ 9,029,765	88,356,509	66,352,733	0	14,193,616	177,952,874
Balance (in shares) at Dec. 31, 2019	33,751	15,049,608
Issuance of share capital	$ 3,674	$ 50,766	(54,440)	0	0	0	0
Issuance of share capital (in shares)	6,123	84,610
Conversion of preferred stock	$ (5,679)	$ 5,679	0	0	0	0	0
Conversion of preferred stock (in shares)	(9,465)	9,465
Buyback of preferred stock	$ (105)	$ 0	(1,623)	0	0	0	(1,728)
Buyback of preferred stock (in shares)	(176)	0
Net income	$ 0	$ 0	0	3,711,528	0	730,005	4,441,533
Exercise of options	$ 500	$ 0	9,661	0	0	0	$ 10,161
Exercise of options (in shares)	835	0					835
Purchase of noncontrolling interests in Aerex and PERC	$ 0	$ 0	(2,579,882)	0	0	(6,820,118)	$ (9,400,000)
Dividends declared	0	0	0	(5,153,552)	0	0	(5,153,552)
Stock-based compensation	0	0	1,163,261	0	0	0	1,163,261
Balance at Dec. 31, 2020	$ 18,641	$ 9,086,210	$ 86,893,486	$ 64,910,709	$ 0	$ 8,103,503	$ 169,012,549
Balance (in shares) at Dec. 31, 2020	31,068	15,143,683

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 4,441,533	$ 13,726,071
Adjustments to reconcile net income to net cash provided by operating activities:
Impairment loss for Mexico assets - discontinued operations	3,351,842	0
Depreciation and amortization of discontinued operations	4,545	4,545
Foreign currency transaction adjustment - discontinued operations	3,528	(104,736)
Loss from discontinued operations	1,542,328	2,433,446
Loss on sale of discontinued operations	0	(3,621,170)
Depreciation and amortization	7,406,509	7,203,102
Deferred income tax benefit	(221,829)	(239,848)
Provision for doubtful accounts	129,107	0
Unrealized (gain) loss on net put/call option	26,000	(56,000)
Compensation expense relating to stock and stock option grants	1,163,261	1,192,224
Gain (Loss) on Disposition of Assets	(13,997)	(445,041)
Foreign currency transaction adjustment	0	(255)
Profit-sharing and equity in earnings of OC-BVI	(506,694)	(60,965)
Distribution of earnings from OC-BVI	318,150	742,350
Change in:
Accounts receivable and contract assets	2,541,096	(356,223)
Inventory	(102,551)	(1,357,032)
Prepaid expenses and other assets	(629,734)	(298,611)
Accounts payable, accrued expenses and other current liabilities, and contract liabilities	(482,156)	(1,342,463)
Net cash provided by operating activities - continuing operations	18,970,938	17,419,394
Net cash used in operating activities - discontinued operations	(1,635,646)	(2,215,736)
Net cash provided by operating activities	17,335,292	15,203,658
Cash flows from investing activities
Additions to property, plant and equipment and construction in progress	(1,728,393)	(3,525,122)
Proceeds from asset dispositions	8,638	453,480
Proceeds from sale of discontinued operations, net of cash provided	0	6,971,234
Acquisition of PERC, net of cash acquired	0	(3,147,438)
Collections on loans receivable	0	734,980
Net cash provided by (used in) investing activities - continuing operations	(11,119,755)	1,487,134
Net cash used in investing activities - discontinued operations	0	(1,499)
Net cash provided by (used in) investing activities	(11,119,755)	1,485,635
Cash flows from financing activities
Dividends paid to common shareholders	(5,133,727)	(5,097,602)
Dividends paid to preferred shareholders	(11,990)	(18,225)
Repurchase of redeemable preferred stock	(1,728)	(24,096)
Proceeds received from exercise of stock options	10,161	15,822
Principal repayments on long-term debt	(32,642)	0
Net cash used in financing activities	(5,169,926)	(5,124,101)
Net increase in cash and cash equivalents	1,045,611	11,565,192
Cash and cash equivalents at beginning of period	42,071,083	31,111,968
Cash and cash equivalents at beginning of period - discontinued operations	831,586	225,509
Less: cash and cash equivalents at end of period - discontinued operations	(154,130)	(831,586)
Cash and cash equivalents at end of period	43,794,150	42,071,083
Non-cash transactions:
Right-of-use assets obtained in exchange for new operating lease liabilities	299,992	2,429,305
Aerex
Cash flows from investing activities
Acquisition of noncontrolling interest in subsidiaries	(8,500,000)	0
PERC Water Corporation
Cash flows from investing activities
Acquisition of noncontrolling interest in subsidiaries	$ (900,000)	$ 0

Principal activity

Principal activity	12 Months Ended
	Dec. 31, 2020
Principal activity
Principal activity	1. Principal activity Consolidated Water Co. Ltd. and its subsidiaries (collectively, the “Company”) supply potable water, treat water for reuse and provide water-related products and services to customers in the Cayman Islands, The Bahamas, the United States and the British Virgin Islands. The Company produces potable water from seawater using reverse osmosis technology and sells this water to a variety of customers, including public utilities, commercial and tourist properties, residential properties and government facilities. The Company designs, builds and sells water production and water treatment infrastructure and manages water infrastructure for commercial and governmental customers. The Company also manufactures a wide range of specialized and custom water industry related products and provides design, engineering, operating and other services applicable to commercial, municipal and industrial water production, supply and treatment.

Accounting policies

Accounting policies	12 Months Ended
	Dec. 31, 2020
Accounting policies
Accounting policies	2. Accounting policies Basis of preparation: Use of estimates: Basis of consolidation: On January 24, 2020, as a result of CW-Holdings' exercise of a call option, CW-Holdings purchased the remaining 49% ownership interest in Aerex for $8,500,000 in cash. After giving effect to this purchase, CW-Holdings owns 100% of the outstanding capital stock of Aerex. On August 11, 2020, CW-Holdings purchased an additional 10% of the ownership of PERC for $900,000 , increasing its ownership of this subsidiary to 61% . Foreign currency: Cash and cash equivalents: include $8.5 million and $12.7 million, respectively, of certificates of deposits with an original maturity of three months or less. As of December 31, 2020, the Company had deposits in U.S. banks in excess of federally insured limits of approximately $10.3 million. As of December 31, 2020, the Company held cash in foreign bank accounts of approximately $32.8 million. Certain transfers from the Company’s Bahamas bank accounts to Company bank accounts in other countries require the approval of the Central Bank of The Bahamas. As of December 31, 2020, the equivalent United States dollar cash balances for deposits held in The Bahamas were approximately $15.9 million. Accounts receivable and allowance for doubtful accounts: Trade accounts receivable also represent our unconditional right, subject only to the passage of time, to receive consideration arising from our performance under contracts with customers. Trade accounts receivable include amounts billed and billable on construction contracts, service and maintenance contracts and contracts for the sale of goods. Billed contract receivables have been invoiced to customers based on contracted amounts. Inventory: Contract assets and liabilities : Billing practices for the Company’s contracts are governed by the contract terms of each project based upon costs incurred, achievement of milestones or predetermined schedules. Billings do not necessarily correlate with revenue recognized over time using the direct inputs method of accounting. Contract assets, which include costs and estimated earnings in excess of billings on uncompleted contracts, arise when the Company recognizes revenue for services performed under its construction and manufacturing contracts, but the Company is not yet entitled to bill the customer under the terms of the contract. Contract liabilities, which include billings in excess of costs and estimated earnings on uncompleted contracts, represent the Company's obligation to transfer goods or services to a customer for which the Company has been paid by the customer or for which the Company has billed the customer under the terms of the contract. Revenue for future services reflected in this account are recognized, and the liability is reduced, as the Company subsequently satisfies the performance obligation under the contract. ​ Costs and estimated earnings in excess of billings on uncompleted contracts and billings in excess of costs and estimated earnings on uncompleted contracts are typically resolved within one year and are not considered The Company considers retention that is withheld on progress billings as not creating an unconditional right to payment until contractual milestones are reached (typically substantial completion). Accordingly, withheld retention is considered a component of contracts assets and liabilities until finally billed to the customer, when obligations have been satisfied and the right to receipt is subject only to the passage of time. The Company’s contract assets and liabilities are reported in a net asset or liability position on a contract-by-contract basis at the end of each reporting period. The Company classifies contract assets and liabilities related to construction and manufacturing contracts in current assets and current liabilities as they will be liquidated in the normal course of contract completion, although this may require more than one year. Property, plant and equipment, net: ​ ​ ​ ​ Buildings 5 to 40 years Plant and equipment 4 to 40 years Distribution system 3 to 40 years Office furniture, fixtures and equipment 3 to 10 years Vehicles 3 to 10 years Leasehold improvements Shorter of 5 years or lease term Lab equipment 5 to 10 years ​ Additions to property, plant and equipment are comprised of the cost of the contracted services, direct labor and materials. Assets under construction are recorded as additions to property, plant and equipment upon completion of the projects. Depreciation commences in the month the asset is placed in service. Interest costs directly attributable to the acquisition and construction of qualifying assets, which are assets that necessarily take a substantial amount of time to be ready for their intended use, are added to the cost of those assets until such time as the assets are substantially ready for use. No interest was capitalized during the years ended December 31, 2020 or 2019. Long-lived assets: Goodwill and intangible assets: ​ For the years ended December 31, 2020 and 2019, the Company estimated the fair value of its reporting units by applying the discounted cash flow method, which relied upon seven-year discrete projections of operating results, working capital and capital expenditures, along with a terminal value subsequent to the discrete period. These seven-year projections were based upon historical and anticipated future results, general economic and market conditions, and considered the impact of planned business and operational strategies. The discount rates for the calculations represented the estimated cost of capital for market participants at the time of each analysis. ​ The Company also estimated the fair value of each of it reporting units for the years ended December 31, 2020 and 2019 by applying the guideline public company method. The Company also estimated the fair value of each of its reporting units for the year ended December 31, 2019 by referencing the market multiples implied by guideline merger and acquisition transactions (the mergers and acquisition method). The Company considered utilizing the mergers and acquisition method for the year ended December 31, 2020 but due to a lack of relevant meaningful mergers and acquisition activity during the year, such method was not utilized for 2020. ​ The Company weighted the fair values estimated for each of its reporting units under each method and summed such weighted fair values to estimate the overall fair value for each reporting unit. The respective weightings the Company applied to each method for the years ended December 31 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 Method Retail Bulk Services Manufacturing Discounted cash flow 80 % 80 % 80 % 80 % Guideline public company 20 % 20 % 20 % 20 % Mergers and acquisitions — % — % — % — % ​ 100 % 100 % 100 % 100 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2019 Method Retail Bulk Manufacturing Discounted cash flow 80 % 80 % 80 % Guideline public company 10 % 10 % 10 % Mergers and acquisitions 10 % 10 % 10 % ​ 100 % 100 % 100 % ​ The fair values the Company estimated for its retail, bulk, services and manufacturing reporting units exceeded their carrying amounts by 101%, 49%, 17%, and 31% respectively, as of December 31, 2020. The fair values the Company estimated for its retail and bulk reporting units exceeded their carrying amounts by 74% and 58%, respectively, as of December 31, 2019. The assets and liabilities for the Companys’ services reporting unit consist almost entirely of those for PERC, which was acquired on October 24, 2019, and therefore the Company estimated that the fair value of its services reporting unit closely approximated its carrying value as of December 31, 2019. The Company’s manufacturing reporting unit consists entirely of Aerex and the remaining 49% ownership interest of Aerex was purchased on January 24, 2020 for $8,500,000. The Company considered this purchase, the manufacturing reporting unit’s results of operations for the year ended December 31, 2019, its projected results of operations for the year ending December 31, 2020, and the amount by which its estimated fair value exceeded its carrying amount as of December 31, 2018 to determine that it is more likely than not that the fair value of the manufacturing reporting unit exceeded its carrying amount as of December 31, 2019. ​ On February 11, 2016, the Company acquired 51% ownership interest in Aerex. In connection with this acquisition the Company recorded goodwill of $8,035,211. Aerex’s actual results of operations for the six months in 2016 following the acquisition fell significantly short of the projected results for this period that were included in the cash flow projections the Company utilized to determine the purchase price for Aerex and the fair values of its assets and liabilities. Due to this shortfall in Aerex’s results of operations, the Company tested Aerex’s goodwill for possible impairment as of September 30, 2016 by estimating its fair value using the discounted cash flow method. As a result of this impairment testing, the Company determined that the carrying value of the Aerex goodwill exceeded its fair value and recorded an impairment loss of $1,750,000 for the three months ended September 30, 2016, included in loss on long-lived asset dispositions and impairments, net in the accompanying consolidated statements of income, to reduce the carrying value of this goodwill to $6,285,211. As part of the Company’s annual impairment testing of goodwill performed during the fourth quarter, in 2017 the Company updated its projections for Aerex’s future cash flows, determined that the carrying value of the Aerex goodwill exceeded its fair value, and recorded an impairment loss of $1,400,000 for the three months ended December 31, 2017, which is included in loss on long-lived asset dispositions and impairments, net in the accompanying consolidated statements of income, to further reduce the carrying value of the goodwill to $4,885,211. ​ Approximately 80% and 68% of Aerex’s revenue, and 89% and 68% of Aerex’s gross profit, for the years ended December 31, 2020 and 2019, respectively, were generated from sales to one customer. In October 2020, this customer verbally informed Aerex that, for inventory management purposes, it was suspending its purchases from Aerex following 2020 for a period of approximately one year. This customer has verbally informed Aerex that it presently expects to recommence its purchases from Aerex beginning with the first quarter of 2022. However, the Company can offer no assurances that this customer will recommence its purchases from Aerex at that time. Furthermore, any such future purchases (should they occur) may not generate as much revenue and gross profit as Aerex has historically earned from this customer. The Company is seeking to replace the anticipated loss in revenue and gross profit from this customer by increasing sales of other products that it manufactures to new and existing customers, however, it may not be able to do so. ​ As a result of this anticipated loss of revenue for Aerex, the Company updated its projections for the manufacturing reporting unit’s future cash flows. Such projections assume, in part, that Aerex’s major customer will recommence its purchases from Aerex in 2022 but at a reduced aggregate amount, as compared to 2020 and 2019. Based upon these updated projections, the Company tested its manufacturing reporting unit’s goodwill for possible impairment as of December 31, 2020. As a result of this impairment testing, it determined that the estimated fair value of the manufacturing reporting unit exceeded its carrying value as of December 31, 2020. However, the Company may be required to record an impairment loss in the future to reduce the carrying value of the manufacturing reporting unit’s goodwill should it be determined that Aerex’s future net cash inflows will be less than the Company’s most current expectations. Any such impairment loss could have a material adverse impact on its consolidated financial condition and results of operations. ​ In February 2019, the Company sold its former Belize subsidiary (see Note 8) As a result of this sale, this former subsidiary has been accounted for as discontinued operations in the consolidated financial statements, and bulk segment goodwill of approximately $380,000 as of December 31, 2018 associated with this former subsidiary was reclassified to long-term assets of discontinued operations in the consolidated statements of financial condition. ​ Investments: ​ Other assets: ​ Income taxes: ​ The Company is not presently subject to income taxes in the other countries in which it operates. ​ Revenue recognition: ​ The following table presents the Company’s revenue disaggregated by revenue source. ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Retail revenue ​ $ 22,952,370 ​ $ 26,456,022 Bulk revenue ​ 24,312,546 ​ 26,986,108 Services revenue ​ 12,937,859 ​ 1,759,446 Manufacturing revenue ​ 12,425,351 ​ 13,592,075 Total revenue ​ $ 72,628,126 ​ $ 68,793,651 ​ Retail revenue The Company produces and supplies water to end-users, including residential, commercial and governmental customers in the Cayman Islands under an exclusive retail license issued to Cayman Water by the Cayman Islands government to provide water in two of the three most populated areas on Grand Cayman Island. Customers are billed on a monthly basis based on metered consumption and bills are typically collected within 30 to 35 days after the billing date. Receivables not collected within 45 days subject the customer to disconnection from water service. In 2020 and 2019, bad debts represented less than 1% of the Company’s total retail sales. The Company recognizes revenue from water sales at the time water is supplied to the customer’s premises. The amount of water supplied is determined and invoiced based upon water meter readings performed at the end of each month. All retail water contracts are month-to-month contracts. The Company has elected the “right to invoice” practical expedient for revenue recognition on its retail water sale contracts and recognizes revenue in the amount to which the Company has a right to invoice. Bulk revenue The Company produces and supplies water to government-owned distributors in the Cayman Islands and The Bahamas. OC-Cayman provides bulk water to the Water Authority-Cayman (“WAC”), a government-owned utility and regulatory agency, under two agreements. The WAC in turn distributes such water to properties in Grand Cayman outside of Cayman Water’s retail license area. The Company sells bulk water in The Bahamas through its majority-owned subsidiary, CW-Bahamas, under two agreements with the Water and Sewerage Corporation of The Bahamas (“WSC”), which distributes such water through its own pipeline system to residential, commercial and tourist properties on the Island of New Providence. CW-Bahamas also sold water to a private resort on Bimini through December 18, 2020, which generated revenue of approximately $127,000 and $237,000 for the years ended December 31, 2020 and 2019, respectively. The Company has elected the “right to invoice” practical expedient for revenue recognition on its bulk water sale contracts and recognizes revenue in the amount to which the Company has a right to invoice. Services and Manufacturing revenue The Company provides design, engineering, management, procurement and construction services for desalination infrastructure through DesalCo, which serves customers in the Cayman Islands, The Bahamas and the British Virgin Islands. The Company also develops, builds, sells, operates and manages water, wastewater and water reuse infrastructure through PERC. All of PERC's customers are companies or governmental entities located in the U.S. The Company, through Aerex, is a custom and specialty manufacturer of water treatment-related systems and products applicable to commercial, municipal and industrial water production. Substantially all of Aerex’s customers are U.S. companies. The Company generates services revenue from DesalCo and PERC and generates manufacturing revenue from Aerex. The Company recognizes revenue for its construction and specialized/custom manufacturing contracts The Company has elected the “right to invoice” practical expedient for revenue recognition on its services agreements and recognizes revenue in the amount to which the Company has a right to invoice. Practical Expedients and Exemptions The Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which the Company recognizes revenue at the amount to which it has the right to invoice for services performed. Comparative amounts:

Cash and cash equivalents

Cash and cash equivalents	12 Months Ended
	Dec. 31, 2020
Cash and cash equivalents
Cash and cash equivalents	3. Cash and cash equivalents Cash and cash equivalents are not restricted by the terms of the Company’s bank accounts as to withdrawal or use. As of December 31, 2020 and 2019, the equivalent United States dollars are denominated in the following currencies: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Bank accounts: ​ ​ United States dollar ​ $ 14,001,264 ​ $ 15,661,140 Cayman Islands dollar ​ 5,650,874 ​ 6,690,274 Bahamian dollar ​ 14,863,287 ​ 6,353,936 Bermudian dollar ​ 2,832 ​ 3,084 ​ ​ 34,518,257 ​ 28,708,434 ​ ​ ​ ​ ​ ​ ​ Short term deposits: ​ ​ United States dollar ​ 5,796,582 ​ 11,100,185 Cayman Islands dollar ​ 2,413,547 ​ 1,209,954 Bahamian dollar ​ 1,065,764 ​ 1,052,510 ​ ​ 9,275,893 ​ 13,362,649 Total cash and cash equivalents ​ $ 43,794,150 ​ $ 42,071,083 ​ Transfers from the Company’s Bahamas bank accounts to Company bank accounts in other countries require the approval of the Central Bank of the Bahamas.

Accounts receivable, net

Accounts receivable, net	12 Months Ended
	Dec. 31, 2020
Accounts receivable, net.
Accounts receivable, net	4. Accounts receivable, net ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Trade accounts receivable ​ $ 21,422,782 ​ $ 22,862,706 Receivable from OC-BVI ​ 62,171 ​ 10,808 Other accounts receivable ​ 269,133 ​ 222,381 ​ ​ 21,754,086 ​ 23,095,895 Allowance for doubtful accounts ​ (270,110) ​ (142,236) Accounts receivable, net ​ $ 21,483,976 ​ $ 22,953,659 ​ The activity for the allowance for doubtful accounts consisted of: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Opening allowance for doubtful accounts ​ $ 142,236 ​ $ 158,902 Provision for doubtful accounts ​ 129,107 ​ — Accounts written off during the year ​ (1,233) ​ (16,666) Ending allowance for doubtful accounts ​ $ 270,110 ​ $ 142,236 ​ Significant concentrations of credit risk are disclosed in Note 18.

Inventory

Inventory	12 Months Ended
	Dec. 31, 2020
Inventory
Inventory	5. Inventory ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Water stock ​ $ 27,938 ​ $ 33,694 Consumables stock ​ 105,540 ​ 118,286 Spare parts stock ​ 7,587,542 ​ 7,539,953 Total inventory ​ 7,721,020 ​ 7,691,933 Less current portion ​ 3,214,178 ​ 3,287,555 Inventory (non-current) ​ $ 4,506,842 ​ $ 4,404,378 ​

Contracts in progress

Contracts in progress	12 Months Ended
	Dec. 31, 2020
Contracts in progress
Contracts in progress	6. Contracts in progress Revenue recognized and amounts billed on contracts in progress are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2020 ​ 2019 Revenue recognized to date on contracts in progress ​ $ 17,534,449 $ 16,054,699 Amounts billed to date on contracts in progress ​ (17,791,928) ​ (15,078,830) Retainage ​ ​ 312,130 ​ ​ 361,556 Net contract asset ​ $ 54,651 ​ $ 1,337,425 ​ The above net balances are reflected in the accompanying consolidated balance sheet as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2020 ​ 2019 Contract assets ​ $ 516,521 $ 1,677,041 Contract liabilities ​ (461,870) ​ (339,616) Net contract asset ​ $ 54,651 ​ $ 1,337,425 ​ ​ ​ As of December 31, 2020 December 31, 2021 thereafter ​ ​ ​ ​

Property, plant and equipment a

Property, plant and equipment and construction in progress	12 Months Ended
	Dec. 31, 2020
Property, plant and equipment and construction in progress
Property, plant and equipment and construction in progress	7. Property, plant and equipment and construction in progress ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Land ​ $ 3,566,537 ​ $ 3,566,537 Buildings ​ 23,250,843 ​ 23,176,106 Plant and equipment ​ 63,734,860 ​ 64,840,636 Distribution system ​ 39,149,063 ​ 36,538,614 Office furniture, fixtures and equipment ​ 3,079,362 ​ 3,038,589 Vehicles ​ 1,999,463 ​ 1,582,053 Leasehold improvements ​ 274,230 ​ 272,092 Lab equipment ​ 12,456 ​ 14,958 ​ ​ 135,066,814 ​ 133,029,585 Less accumulated depreciation ​ 77,378,830 ​ 71,790,833 Property, plant and equipment, net ​ $ 57,687,984 ​ $ 61,238,752 Construction in progress ​ $ 440,384 ​ $ 1,335,597 ​ As of December 31, 2020, the Company had outstanding capital commitments of $29,145. The Company maintains insurance for loss or damage to all fixed assets that it deems susceptible to loss. The Company does not insure its underground distribution system as the Company considers the possibility of material loss or damage to this system to be remote. During the years ended December 31, 2020 and 2019, $1,653,501 and $7,755,375, respectively ,

Discontinued operations

Discontinued operations	12 Months Ended
	Dec. 31, 2020
Discontinued operations.
Discontinued operations	8. Discontinued operations Mexico project development In May 2010, the Company acquired, through its wholly-owned Netherlands subsidiary, CW-Cooperatief, a 50% interest in NSC, a development stage Mexican company. CW-Cooperatief has since purchased, through the conversion of a loan it made to NSC, additional shares that increased its ownership interest in NSC to 99.99%. NSC was formed to pursue a project (the “Project”) that originally encompassed the construction, operation and minority ownership of a 100 million gallon per day seawater reverse osmosis desalination plant to be located in northern Baja California, Mexico and accompanying pipelines to deliver water to the Mexican potable water system. As discussed in paragraphs that follow, during 2015 the scope of the Project was defined by the State of Baja California (the “State”) to consist of a first phase consisting of a 50 million gallon per day plant and an aqueduct that connects to the Mexican potable water infrastructure and a second phase consisting of an additional 50 million gallons per day of production capacity. Through a series of transactions that began in 2012 In August 2014, the State enacted new legislation to regulate Public-Private Association projects which involve the type of long-term contract between a public-sector authority and a private party required for the Project (the “APP Law”). Pursuant to this new legislation, in January 2015, NSC submitted an expression of interest for its project to the Ministry of Infrastructure and Urban Development of the State of Baja California (“SIDUE”). SIDUE accepted NSC’s expression of interest and requested that NSC submit a detailed proposal for the Project that complied with the requirements of the new legislation. NSC submitted this detailed proposal (the “APP Proposal”) to SIDUE in late March 2015. The new legislation required that such proposal be evaluated by SIDUE and submitted to the Public-Private Association Projects State Committee (the “APP Committee”) for review and authorization. In response to its APP Proposal, in September 2015 NSC received a letter dated June 30, 2015 from the Director General of the Comisión Estatal del Agua de Baja California (“CEA”), the State agency with responsibility for the Project, stating that (i) the Project is in the public interest with high social benefits and is consistent with the objectives of the State development plan; and (ii) that the Project should proceed, and the required public tender should be conducted. In November 2015, the State officially commenced the tender for the Project, the scope of which the State defined as a first phase to be operational in 2019 consisting of a 50 million gallon per day plant and an aqueduct that connects to the Mexican potable water infrastructure and a second phase to be operational in 2024 consisting of an additional 50 million gallons per day of production capacity. A consortium (the “Consortium”) comprised of NSC, NuWater S.A.P.I. de C.V. (“NuWater”) and Suez Medio Ambiente México, S.A. de C.V. (“Suez MA”), a subsidiary of SUEZ International, S.A.S., submitted its tender for the Project in April 2016 and in June 2016, the State designated the Consortium as the winner of the tender process for the Project. ​ In August 2016, NSC and NuWater incorporated Newco under the name Aguas de Rosarito S.A.P.I. de C.V. (“AdR”), a special purpose company, to complete the Project and executed a shareholders agreement for AdR agreeing among other things that (i) AdR would purchase the land and other Project assets from NSC on the date that the Project begins commercial operations and (ii) AdR would enter into a Management and Technical Services Agreement with NSC effective on the first day that the Project begins commercial operations. NSC initially owned 99.6% of the equity of AdR. In February 2018, CW-Holdings acquired the remaining 0.4% ownership in AdR from NuWater. ​ On August 22, 2016, the Public Private Partnership Agreement for the Project (the “APP Contract”) was executed between AdR, CEA, the Government of Baja California, as represented by the Secretary of Planning and Finance and the Public Utilities Commission of Tijuana (“CESPT”). The APP Contract required AdR to design, construct, finance and operate a seawater reverse osmosis desalination plant (and accompanying aqueduct) with a capacity of up to 100 million gallons per day in two phases: the first with a capacity of 50 million gallons per day and an aqueduct to the Mexican public water system in Tijuana, Baja California and the second phase with a capacity of 50 million gallons per day. The first phase was to be operational within 36 months of commencing construction and the second phase was to be operational by January 2025. The APP Contract further required AdR to operate and maintain the plant and aqueduct for a period of 37 years starting from the commencement of operation of the first phase. At the end of the operating period, the plant and aqueduct would have been transferred to CEA. ​ In December 2016, the Congress of the State of Baja California, Mexico (the “Congress”) passed Decreto #57 which, among other things, ratified and authorized the payment obligations of the corresponding public entities under the APP Contract and authorized the corresponding public entities to obtain a credit facility to guarantee their payment obligations. During 2017, following consultations between representatives of the State and the Ministry of Finance of the Federal Government of Mexico, it was determined that certain amendments to Decreto #57 were required to comply with recent changes to the Federal Financial Discipline Law for Federative Entities and Municipalities. In addition, an amendment of Decreto #57 was required to authorize the inclusion of revenue from the CESPT in the primary payment trust for the Project. These amendments were included in Decreto #168, which was approved by the Congress in December 2017. The authorization of the payment obligations of the public entities under the APP Contract and for the execution of the credit agreement to guarantee such payment obligations given in Decreto #57, as amended by Decreto #168, expired on December 31, 2018. During the congressional session held at the end of March 2019, the Congress passed Decreto #335, which renewed the authorizations for the various payment trusts, guaranties and bank credit lines required to be established for the Project by the State entities. Decreto #335 expired December 31, 2019. During the congressional session held at the end of December 2019, the Congress passed Decreto #37, which renewed the authorizations for the various payment trusts, guaranties and bank credit lines required to be established for the Project by the State entities. Decreto #37 expired June 30, 2020. Both the exchange rate for the Mexican peso relative to the dollar and general macroeconomic conditions in Mexico varied since the execution of the APP Contract. These changes adversely impacted the estimated construction, operating and financing costs for the Project. The APP Contract and the APP Law allowed for the parties to negotiate (but did not guarantee) modifications to the consideration (i.e. water tariff) under the APP Contract in the event of such significant macroeconomic condition changes. In February 2017, AdR submitted proposals to CEA requesting the definition of the mechanism required by the APP Contract to update the consideration under the APP Contract for changes in foreign exchange rates, lending rates and certain laws which have impacted the Project. On June 1, 2018, AdR and CEA executed an amendment to the APP Contract which, among other things, increased the scope of Phase 1 of the Project for including the aqueduct originally designated for Phase 2, and addressed AdR’s concerns regarding the impact on the Project for changes in the exchange rate for the peso relative to the dollar and changes in interest rates that occurred subsequent to the submission of the Consortium’s bid for the Project. As a result of this amendment to the APP Contract, the final cost of Phase 1 and the related consideration to be charged by AdR under the APP Contract would have been determined based upon the bid submitted by the Consortium, the changes set forth in the amendment to the APP Contract and the economic conditions (e.g. interest rates and currency exchange rates) in effect on the financial closing date for Phase 1. ​ In February 2018, AdR executed a subscription agreement (the “Agreement”) for the equity funding required for the Project. The Agreement calls for NSC to retain a minimum of 25% of the equity in AdR. One or more affiliates of Greenfield SPV VII, S.A.P.I. de C.V. (“Greenfield”), a Mexico company managed by an affiliate of a leading U.S. asset manager, would acquire a minimum of 55% of the equity of AdR. The Agreement also provided Suez MA with the option to purchase 20% of the equity of AdR. If Suez MA did not exercise this option, NSC would retain 35% of the equity of AdR and Greenfield will acquire 65% of the equity of AdR. The Agreement became effective when the certain conditions precedent related to the Project were met. The aggregate investment to be made by the equity partners in the Project, in the form of equity and subordinated shareholder loans, is presently estimated at approximately 20% of the total cost of Phase 1 of the Project. This Agreement was scheduled to expire on September 30, 2020. NSC expected to generate a portion of its funding for its additional future equity investment in AdR through the sale to AdR of the land it had purchased for the Project. ​ Through June 30, 2020, NSC had paid approximately $3.0 million to acquire rights of way for the aqueduct to be constructed for the Project to deliver water to the Mexico public water system. ​ On June 29, 2020, AdR received a letter (the “Letter”) from the Director General of CEA and the Director General of CESPT terminating the APP Contract. The reasoning provided in the Letter for the decision to terminate the APP Contract is that the Project (a) is not financially feasible due to increases in the construction, operating and financing costs for the Project in addition to negative changes in economic conditions (e.g. interest rates and currency exchange rates); (b) is not sustainable for CEA and CESPT given its financial unfeasibility; (c) puts pressure to increase the rates charged to customers; (d) would force the Government of the State to cover a deficit of CEA and CESPT, thus preventing the State Government from spending on investment programs or social expenditures; and (e) negatively affects the general interest. The Letter requested that AdR provide an inventory of the assets that currently comprise the “Project Works” (as defined in the APP Contract) for the purpose of acknowledging and paying the non-recoverable expenses made by AdR in connection with the Project, with such reimbursement to be calculated in accordance with the terms of the APP Contract. The applicable law requires this list of non-recoverable expenses made by AdR in connection with the Project be submitted to CEA and CESPT within 20 business days from the date of receipt of the Letter. ​ As a consequence of the termination of the APP Contract, the rights of way NSC and AdR acquired for the aqueduct no longer have any value due to the loss of their strategic importance derived from their incorporation in the Project. Consequently, the Company recorded an impairment loss of approximately $(3.0 million) for the three months ended June 30, 2020 to write off its investment in these rights of way. The Company also recorded adjustments during the three months ended June 30, 2020 of $2.6 million and $2.2 million to reduce its operating lease right-of-use assets and operating lease liabilities, respectively, due to the planned cancellation (or transfer to the State) of a long-term land lease associated with the Project. ​ As a result of the cancellation of the APP Contract, during the three months ended September 30, 2020 the Company discontinued all project development activities associated with the Project and engaged a real estate broker and commenced active marketing efforts to sell the land NSC purchased for the Project. Accordingly, the assets and liabilities of CW-Cooperatief, NSC and AdR, as well as all Project development expenses and the impairment loss incurred by the Company, have been reclassified from the services segment to discontinued operations in the accompanying consolidated financial statements as of and for the year ended December 31, 2020 and 2019. ​ Summarized financial information for the Mexico project development is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Cash ​ $ 154,130 ​ $ 831,586 Prepaid expenses and other current assets ​ ​ 88,978 ​ ​ 111,220 Value added taxes receivable ​ ​ 1,267,991 ​ ​ 676,250 Property, plant and equipment, net ​ 5,682 ​ 10,227 Land and rights of way ​ 21,126,898 ​ 24,162,523 Other assets ​ 33,909 ​ 3,497,216 Total assets of discontinued operations ​ $ 22,677,588 ​ $ 29,289,022 ​ ​ ​ Total liabilities of discontinued operations ​ $ 190,933 ​ $ 2,858,314 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Revenues ​ $ — ​ $ — Income from operations ​ $ — ​ $ — Net loss from discontinued operations ​ $ 4,902,243 ​ $ 2,333,255 Gain on sale of discontinued operations ​ $ — ​ $ — Depreciation expense ​ $ 4,545 ​ $ 4,545 ​ AdR initiated an amparo ​ The Company, AdR and NSC plan to vigorously pursue all legal remedies and courses of action available under the APP Contract and applicable law (including international treaties and agreements) with respect to any rights they may have upon termination of the APP Contract, including the reimbursement of expenses and investments. However, the Company cannot provide any assurances that it will be able to obtain reimbursement for any expenses or investments made with respect to the Project. ​ The Company, AdR and NSC will terminate the various agreements ancillary to the Project as a result of the termination of the APP Contract unless the State elects to assume such agreements. ​ Project Litigation Immediately following CW-Cooperatief’s acquisition of its initial 50% ownership in NSC, the remaining 50% ownership interest in NSC was held by an unrelated company, Norte Sur Agua, S. de R.L. de C.V. (“NSA”). NSA subsequently transferred ownership of half of its shares in NSC to EWG Water LLC (“EWG”) and the other half of its shares in NSC to an individual (the “individual shareholder”). In February 2012, CW-Cooperatief paid $300,000 to enter into an agreement (the “Option Agreement”) that provided it with an option, exercisable through February 7, 2014, to purchase the shares of NSC owned by the individual shareholder for a price of $1.0 million along with an immediate usufruct and power of attorney to vote those shares. Such shares constituted 25% of the ownership of NSC as of February 2012. In May 2013, NSC repaid a $5.7 million loan payable to CW-Cooperatief by issuing additional shares of its stock. As a result of this share issuance to CW-Cooperatief, the Company indirectly acquired 99.99% of the ownership of NSC. The Option Agreement contained an anti-dilution provision that required CW-Cooperatief to transfer or otherwise cause the individual shareholder to acquire, for a total price of $1 (regardless of their par or market value), shares in NSC of an amount sufficient to maintain the individual shareholder’s 25% ownership interest in NSC if (i) any new shares of NSC were issued subsequent to the execution of the Option Agreement (causing the individual shareholder’s 25% ownership interest in NSC to be decreased); and (ii) CW-Cooperatief did not exercise its share purchase option by February 7, 2014. CW-Cooperatief exercised its option and paid the $1.0 million to the individual shareholder to purchase the Option Agreement shares in February 2014. ​ In January 2018, EWG initiated an ordinary mercantile claim against the individual shareholder, NSC and CW-Cooperatief, (with AdR being named as a third party to be called to trial) before the Tenth Civil Judge in Tijuana, Baja California for Mercantile Matters (the “Tenth Civil Judge”). In the ordinary mercantile claim, EWG challenged, among other things, the transactions contemplated under the Option Agreement, and therefore, the capital investment transactions that increased the ownership interest of CW-Cooperatief in NSC to 99.99% as a consequence of the Option Agreement. EWG requested that the courts, as a preliminary matter (a) suspend the effectiveness of the challenged transactions; (b) order certain public officials in Mexico to record the pendency of the lawsuit in the public records (including a special request to register a lien over the real estate owned by NSC); (c) appoint an inspector for NSC to oversee its commercial activities; and (d) order public officials in Mexico and credit institutions abroad to refrain from authorizing or executing any legal act related with the activities of the plaintiff, the co-defendants and the third party called to trial to avoid damages to third parties, including those with whom negotiations or any form of commercial or administrative activities, or activities of any other nature related with the “Rosarito” water desalination project, are being conducted. The Tenth Civil Judge granted, ex-parte, the preliminary relief sought by EWG, which resulted in the issuance of official writs to several governmental and public entities involved with the “Rosarito” water desalination project, including the registration of the pendency of the lawsuit in certain public records. ​ On October 16, 2018, NSC was served with the ordinary mercantile claim. On November 7, 2018, NSC filed a legal response to the claim, vigorously opposing the claims made by EWG. In addition to such legal response, NSC filed (i) a request to submit the claim to arbitration, based on certain provisions of the by-laws of NSC, (ii) an appeal remedy against the preliminary relief, and (iii) a request for the setting of a guarantee to release the preliminary relief granted in favor of EWG. ​ On October 1, 2020, and following an order from a Federal Judge obtained by NSC, the Tenth Civil Judge resolved to (i) move the claim of EWG to arbitration, and (ii) suspend the corresponding ordinary mercantile procedure. Although EWG has certain remedies available to oppose to such resolution, at present NSC does not have knowledge of the filing thereof. ​ Notwithstanding the resolution of the Tenth Civil Judge to move to arbitration, subparagraphs a) through e) that follow describe certain separate amparo claims, an appeal and an administrative act arising from or relating to such ordinary mercantile claim, all in chronological order. Due to the current global COVID-19 pandemic, most tribunals in Mexico have suspended their activities intermittently since March 2020, with certain such tribunals restarting activities in August 2020. As such, several resolutions are pending issuance. ​ a) AdR amparo claim against the preliminary relief sought by EWG. In April 2018, AdR filed an amparo against the official writs issued by the Tenth Civil Judge to two governmental entities. In May 2018, the amparo claim was amended to also request protection against additional official writs issued by the Tenth Civil Judge to two other governmental entities and one banking institution. In May 2018, the Third District Court for Amparo and Federal Trials in the State of Baja California with residence in Tijuana granted a temporary suspension of the effects and consequences of the claimed official writs issued by the Tenth Civil Judge pending a further determination by the Third District Court. Such suspension was granted definitively in July 2018, and in August 2018, a resolution determining that the claimed official writs are unconstitutional, was issued. EWG appealed such resolution, and in January 2020, the Collegiate Tribunal resolving such appeal dismissed the amparo filed by AdR. However, such dismissal does not adversely impact AdR, considering the resolution to the appeal mentioned in subparagraph b) that follows. b) Appeal filed by NSC against the preliminary relief sought by EWG. The appeal remedy filed by NSC on November 7, 2018 mentioned previously, suspended the proceeding (through the posting of a guarantee by NSC) and was resolved in December 2019 and communicated to EWG in January 2020. Such resolution revoked the order of the Tenth Civil Judge whereby EWG was granted the preliminary relief c) Amparo filed by EWG against the revocation of the preliminary relief. In January 2020, EWG filed a new amparo claim against the resolution of the appeal remedy previously mentioned in item b). NSC has responded to this new amparo to vigorously oppose such amparo claim of EWG and to uphold the resolution of such appeal remedy. To this date, this amparo claim has not been resolved and, as such, it does not affect the revocation of the preliminary relief. d) Administrative cancellation of registrations before the Public Registry of Property. Despite the posting of a guarantee to release the preliminary relief sought by EWG within the ordinary mercantile claim, the Tenth Civil Judge failed to make the resolution effective, which would thereby rescind the previously mentioned preliminary relief granted to EWG Consequently, on June 19, 2019 (i.e. before obtaining a resolution revoking the preliminary relief as mentioned previously), NSC filed before the Public Registry of Property of Baja California a cancellation request for the provisional lien and the preventive annotation recorded against NSC’s property in the public real estate records. ​ On June 24, 2019, the Public Registry of Property of Baja California issued an encumbrances cancellation resolution, approving the release of the provisional lien and the preventive annotation recorded against NSC’s property in the public real estate records. Such encumbrances cancellation resolution was registered before the Public Registry of Property of Playas de Rosarito on June 25, 2019. On June 26, 2019, the Public Registry of Property of Playas de Rosarito issued a certificate of no liens with respect to the real estate owned by NSC. ​ e) Amparo filed by EWG against the administrative cancellation of registrations before the Public Registry of Property. In November 2019, NSC learned that EWG had filed an amparo claim before the Third District Court in Tijuana against such encumbrances cancellation resolution, and in December 2019, NSC responded to such claim, vigorously opposing it. Thereafter, NSC submitted a motion to dismiss, based on the resolution of the appeal remedy mentioned previously in subparagraph b) revoking the preliminary relief, previously mentioned in item (ii). The Court resolved in favor of such motion to dismiss, Notwithstanding the resolution to move to arbitration mentioned previously, CW-Cooperatief has not been officially served with the ordinary mercantile claim, and AdR has not been notified that it has to appear for such trial. In any event, AdR is only a named third party called to trial in this claim, and no claims have been made by EWG against AdR. ​ The Company cannot presently determine what impact the resolution of this litigation may have on its consolidated financial condition, results of operations or cash flows. ​ CW-Belize ​ On February 14, 2019, the Company completed the sale of its former subsidiary, Consolidated Water (Belize) Limited ("CW-Belize") to Belize Water Services Ltd. (“BWSL”) effective January 1, 2019. After adjustments, the final price for CW-Belize was approximately $7.0 million. Pursuant to the sale and purchase agreement, BWSL initially paid the Company $6.735 million of the purchase price and approximately $265,000 was withheld to cover indemnification obligations of the Company under the agreement. The remaining $265,000 of the purchase price was paid by BWSL in August 2019. As a result of the sale of CW-Belize, the Company realized a gain of $3,621,170 , which is reported as gain on sale of discontinued operations in the accompanying consolidated statement of operations for the year ended December 31, 2019. ​ CW-Bali ​ Through its subsidiary, CW-Bali, the Company built a seawater reverse osmosis desalination plant located in Nusa Dua, one of the primary tourist areas of Bali, Indonesia. CW-Bali’s sales volumes were never sufficient ​ In June 2019, the Company sold its CW-Bali assets and stock for $365,000 and $25,000, respectively. Such sales are included in gain on asset dispositions and impairments, net in the accompanying consolidated statement of income for the year ended December 31, 2019.

Intangible assets

Intangible assets	12 Months Ended
	Dec. 31, 2020
Intangible assets
Intangible assets	9. Intangible assets In February 2016, the Company purchased a 51% ownership interest in Aerex Industries, Inc. The purchase transaction identified certain intangible assets with a fair value of $5,900,000 and useful lives as follows: non-compete (5 years), trade name (15 years), certifications/programs (3 years), customer backlog (1 year), and customer relationships (4 years). In January 2020, the Company acquired the remaining 49% ownership interest in Aerex. In October 2019, the Company purchased a 51% ownership interest in PERC Water Corporation. The purchase transaction identified certain intangible assets with a fair value of $3,990,000 and useful lives as follows: non-compete (3 years), trade name (15 years), customer backlog (2 years), and facility management contracts (6 years). In August 2020, the Company purchased an additional 10% of the ownership of PERC, increasing its ownership of this subsidiary to 61% . The costs and accumulated amortization for these assets were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Cost ​ ​ Non-compete agreements ​ $ 530,000 ​ $ 530,000 Trade names ​ 2,700,000 ​ 2,700,000 Certifications/programs ​ 2,000,000 ​ 2,000,000 Customer backlogs ​ 460,000 ​ 460,000 Customer relationships ​ ​ 2,000,000 ​ ​ 2,000,000 Facility management contracts ​ 2,200,000 ​ 2,200,000 ​ ​ 9,890,000 ​ 9,890,000 Accumulated amortization ​ ​ ​ Non-compete agreements ​ (443,889) ​ (320,556) Trade names ​ (560,000) ​ (380,000) Certifications/programs ​ (2,000,000) ​ (2,000,000) Customer backlogs ​ (310,000) ​ (130,000) Customer relationships ​ ​ (2,000,000) ​ ​ (1,958,333) Facility management contracts ​ (427,778) ​ (61,111) ​ ​ (5,741,667) ​ (4,850,000) Intangible assets, net ​ $ 4,148,333 ​ $ 5,040,000 ​ Amortization of intangible assets for each of the next five years and thereafter is expected to be as follows: ​ ​ ​ ​ ​ 2021 $ 746,667 2022 ​ 582,778 2023 ​ 546,667 2024 ​ 546,667 2025 ​ 485,556 Thereafter ​ 1,239,998 ​ ​ $ 4,148,333 ​ Amortization expense was $891,667 and $841,667 for the years ended years ended December 31, 2020 and 2019, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases
Leases	10. Leases The Company leases property and equipment under operating leases, primarily office and warehouse locations. For leases with terms greater than twelve months, the related asset and obligation are recorded at the present value of lease payments over the term. Many of these leases contain rental escalation clauses which are factored into the determination of lease payments when appropriate. When available, the lease payments are discounted using the rate implicit in the lease; however, the Company’s current leases do not provide a readily determinable implicit rate. Therefore, the Company’s incremental borrowing rate is estimated to discount the lease payments based on information available at lease commencement. These leases contain both lease and non-lease components, which the Company has elected to treat as a single lease component. The Company elected not to recognize leases that have an original lease term, including reasonably certain renewal or purchase obligations, of twelve months or less in its consolidated balance sheets for all classes of underlying assets. Lease costs for such short-term leases are expensed on a straight-line basis over the lease term. The land used by the Company to operate its seawater desalination plants in the Cayman Islands and The Bahamas are owned by the Company or leased to the Company for immaterial annual amounts and are not included in the lease amounts presented on the consolidated balance sheets. AdR entered into a lease for land to be used in the Project with an initial effective term of 20-years from the date of full operation of its proposed seawater desalination plant. The lease is cancellable by AdR should it ultimately not proceed with the Project. On June 29, 2020, AdR was notified that the APP Contract was terminated. As a result, the Company, AdR and NSC expect to terminate the various agreements ancillary to the Project or to transfer them to the State, including this land lease for the Project. As such, the lease amounts as of December 31, 2020 do not include this lease. All lease assets denominated in a foreign currency are measured using the exchange rate at the commencement of the lease. All lease liabilities denominated in a foreign currency are remeasured using the exchange rate as of the consolidated balance sheet date. Effective May 1, 2019, the Company executed a new lease for its office located in the Cayman Islands under similar terms compared to the prior lease. This new lease expires April 30, 2024. Lease assets and liabilities The following table presents the lease-related assets and liabilities and their respective classification on the consolidated balance sheets: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2020 ​ 2019 ASSETS ​ ​ Current ​ ​ ​ Prepaid expenses and other current assets ​ $ 108,303 ​ $ 33,567 Current assets of discontinued operations ​ ​ — ​ ​ 2,530 Noncurrent ​ ​ ​ ​ Operating lease right-of-use assets ​ 1,329,561 ​ 1,811,516 Long-term assets of discontinued operations ​ ​ 33,909 ​ ​ 2,627,696 Total lease right-of-use assets ​ $ 1,471,773 ​ $ 4,475,309 ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ Current ​ ​ ​ Current maturities of operating leases ​ $ 455,788 ​ $ 688,540 Current liabilities of discontinued operations ​ ​ 29,432 ​ ​ 67,211 Noncurrent ​ ​ ​ ​ Noncurrent operating leases ​ ​ 982,076 ​ ​ 1,156,543 Noncurrent liabilities of discontinued operations ​ 2,499 ​ 2,679,932 Total lease liabilities ​ $ 1,469,795 ​ $ 4,592,226 ​ ​ ​ ​ ​ ​ ​ Weighted average remaining lease term: ​ ​ Operating leases ​ 3.4 years ​ 3.5 years Operating leases - discontinued operations ​ ​ 1.1 years ​ ​ 24.0 years ​ ​ ​ ​ Weighted average discount rate: ​ ​ ​ Operating leases ​ 4.15% ​ 4.37% Operating leases - discontinued operations ​ ​ 3.48% ​ ​ 4.68% ​ The components of lease cost were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ ​ 2020 ​ 2019 ​ Operating lease costs ​ $ 773,756 ​ $ 563,358 ​ Short-term lease costs ​ 5,518 ​ ​ 16,469 ​ Lease costs - discontinued operations ​ ​ 127,983 ​ ​ 234,045 ​ Total lease costs ​ $ 907,257 ​ $ 813,872 ​ ​ Supplemental cash flow information related to leases is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ ​ 2020 ​ 2019 ​ Cash paid for amounts included in measurement of liabilities: ​ ​ ​ ​ ​ Operating cash outflows for operating leases ​ $ 708,095 ​ $ 717,172 ​ Operating cash outflows for operating leases - discontinued operations ​ ​ 127,153 ​ ​ 250,833 ​ ​ Future lease payments relating to the Company's operating lease liabilities from continuing operations as of December 31, 2020 were as follows: ​ ​ ​ ​ ​ Years ending December 31, Total 2021 ​ $ 505,206 2022 ​ 402,563 2023 ​ 405,113 2024 ​ 186,670 2025 ​ ​ 43,229 Thereafter ​ — Total future lease payments ​ 1,542,781 Less: imputed interest ​ (104,917) Total lease obligations ​ 1,437,864 Less: current obligations ​ (455,788) Noncurrent lease obligations ​ $ 982,076 ​ ​ ​ ​ ​ ​ ​

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2020
Income taxes
Income taxes	11. Income taxes The components of income before income taxes for the years ended December 31, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Foreign (not subject to income taxes) ​ $ 6,475,693 ​ $ 13,593,497 Mexico ​ (4,903,988) ​ (2,458,210) United States ​ 2,956,552 ​ 2,657,405 ​ ​ 4,528,257 ​ 13,792,692 Less gain on sale of discontinued operations ​ ​ — ​ ​ (3,621,170) Less discontinued operations ​ 4,902,243 ​ 2,333,255 ​ ​ $ 9,430,500 ​ $ 12,504,777 ​ The Company’s provision for income taxes for the years ended December 31, 2020 and 2019, which related to U.S. operations, consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Current: ​ ​ ​ ​ ​ ​ Federal ​ $ 191,322 ​ $ 143,567 State ​ ​ 87,630 ​ ​ 171,093 Foreign ​ ​ — ​ ​ — Total ​ ​ 278,952 ​ ​ 314,660 Deferred: ​ ​ ​ ​ Federal ​ ​ (132,957) ​ ​ (203,031) State ​ ​ (59,271) ​ ​ (45,008) Foreign ​ ​ — ​ ​ — Total ​ ​ (192,228) ​ ​ (248,039) Total provision ​ $ 86,724 ​ $ 66,621 ​ A reconciliation of the U.S. statutory federal tax rate to the effective rate for the years ended December 31, 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 U.S. statutory federal rate ​ 21.00 % 21.00 % State taxes, net of federal effect 4.00 % 4.38 % Nontaxable foreign income (17.28) % (19.98) % Research & development tax credit (11.73) % (3.82) % Permanent items (0.67) % (0.87) % Valuation allowance for deferred tax assets 5.60 % (0.18) % ​ 0.92 % 0.53 % ​ The tax effects of significant items comprising the Company’s net long-term deferred tax liability as of December 31, 2020 and 2019 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Continuing Operations ​ ​ ​ ​ ​ ​ Deferred tax assets: ​ ​ Research & development tax credits ​ $ 613,003 ​ $ 166,653 Accrued compensation ​ ​ 110,092 ​ ​ — Valuation allowances ​ (496,343) ​ (43,900) ​ ​ 226,752 ​ 122,753 Deferred tax liabilities: ​ ​ Property and equipment ​ 252,800 ​ 148,707 Intangible assets ​ 1,188,009 ​ 1,380,328 ​ ​ 1,440,809 ​ 1,529,035 ​ ​ ​ ​ ​ ​ ​ Net deferred tax liability ​ $ 1,214,057 ​ $ 1,406,282 ​ ​ ​ ​ ​ ​ ​ Discontinued Operations ​ ​ ​ ​ ​ ​ Deferred tax assets: ​ ​ ​ ​ ​ ​ Operating loss carryforwards - Mexico ​ $ 4,296,453 ​ $ 3,427,295 Land basis difference - Mexico ​ ​ 1,262,159 ​ ​ 1,164,365 Start-up costs - Mexico ​ ​ 4,904,337 ​ ​ 4,608,990 Valuation allowances ​ ​ (10,462,949) ​ ​ (9,200,650) ​ ​ $ — ​ $ — ​

Earnings per share

Earnings per share	12 Months Ended
	Dec. 31, 2020
Earnings per share
Earnings per share	12. Earnings per share Earnings per share (“EPS”) are computed on a basic and diluted basis. Basic EPS is computed by dividing net income (less preferred stock dividends) available to common stockholders by the weighted average number of common shares outstanding during the period. The computation of diluted EPS assumes the issuance of common shares for all potential common shares outstanding during the reporting period and, if dilutive, the effect of stock options as computed under the treasury stock method. The following summarizes information related to the computation of basic and diluted EPS: ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ $ 8,613,771 ​ $ 10,888,178 Less: preferred stock dividends ​ (11,740) ​ (11,937) Net income from continuing operations available to common shares in the determination of basic earnings per common share ​ 8,602,031 ​ 10,876,241 Total income (loss) from discontinued operations ​ (4,902,243) ​ 1,287,915 Net income available to common shares in the determination of basic earnings per common share ​ $ 3,699,788 ​ $ 12,164,156 ​ ​ ​ ​ ​ ​ ​ Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ 15,119,305 ​ 15,025,639 Plus: ​ ​ ​ ​ Weighted average number of preferred shares outstanding during the period ​ 33,814 ​ 33,983 Potential dilutive effect of unexercised options and unvested stock grants ​ 70,836 ​ 77,454 Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ 15,223,955 ​ 15,137,076 ​

Dividends

Dividends	12 Months Ended
	Dec. 31, 2020
Dividends.
Dividends	13. Dividends Interim dividends declared on Class A common stock and redeemable preferred stock for each quarter of the respective years ended December 31, 2020 and 2019 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 First Quarter ​ $ 0.085 ​ $ 0.085 Second Quarter ​ 0.085 ​ 0.085 Third Quarter ​ 0.085 ​ 0.085 Fourth Quarter ​ 0.085 ​ 0.085 ​ ​ $ 0.34 ​ $ 0.34 ​

Segment information

Segment information	12 Months Ended
	Dec. 31, 2020
Segment information
Segment information	14. Segment information The Company has four reportable segments: retail, bulk, services and manufacturing. The retail segment operates the water utility for the Seven Mile Beach and West Bay areas of Grand Cayman Island pursuant to an exclusive license granted by the Cayman Islands government. The bulk segment supplies potable water to government utilities in Grand Cayman and The Bahamas under long-term contracts. The services segment designs, constructs and sells water infrastructure and provides management and operating services to third parties. The manufacturing segment manufactures and services a wide range of custom and specialized water-related products applicable to commercial, municipal and industrial water production, supply and treatment. Consistent with prior periods, the Company records all non-direct general and administrative expenses in its retail business segment and does not allocate any of these non-direct expenses to its other three business segments. The accounting policies of the segments are consistent with those described in Note 2. The Company evaluates each segment’s performance based upon its income (or loss) from operations. All intercompany transactions are eliminated for segment presentation purposes. The Company’s segments are strategic business units that are managed separately because each segment sells different products and/or services, serves customers with distinctly different needs and generates different gross profit margins. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Retail Bulk Services Manufacturing Total Revenue ​ $ 22,952,370 ​ $ 24,312,546 ​ $ 12,937,859 ​ $ 12,425,351 $ 72,628,126 Cost of revenue ​ 11,080,814 ​ 16,959,563 ​ 9,698,214 ​ 8,121,080 ​ 45,859,671 Gross profit ​ 11,871,556 ​ 7,352,983 ​ 3,239,645 ​ 4,304,271 ​ 26,768,455 General and administrative expenses ​ 12,879,445 ​ 1,260,062 ​ 2,834,917 ​ 1,460,474 ​ 18,434,898 Gain on asset dispositions and impairments, net ​ 2,965 ​ 7,213 ​ 3,801 ​ 18 ​ 13,997 Income (loss) from operations ​ $ (1,004,924) ​ $ 6,100,134 ​ $ 408,529 ​ $ 2,843,815 ​ 8,347,554 Other income, net ​ ​ ​ ​ ​ ​ ​ 1,082,946 Income before income taxes ​ ​ ​ ​ ​ 9,430,500 Provision for income taxes ​ ​ ​ ​ ​ 86,724 Net income from continuing operations ​ ​ ​ ​ ​ 9,343,776 Income from continuing operations attributable to non-controlling interests ​ ​ ​ ​ ​ 730,005 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ 8,613,771 Net loss from discontinued operations ​ ​ ​ ​ ​ (4,902,243) Net income attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ $ 3,711,528 ​ Depreciation and amortization expenses for the year ended December 31, 2020 for the retail, bulk, services and manufacturing segments were $2,388,781, $3,869,377, $762,182 and $386,169, respectively. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 ​ Retail Bulk Services Manufacturing Total Accounts receivable, net ​ $ 2,444,455 ​ $ 17,022,813 ​ $ 1,420,609 ​ $ 596,099 ​ $ 21,483,976 Inventory, current and non-current ​ $ 2,787,163 ​ $ 3,795,544 ​ $ — ​ $ 1,138,313 ​ $ 7,721,020 Property, plant and equipment, net ​ $ 27,947,545 ​ $ 27,611,567 ​ $ 487,973 ​ $ 1,640,899 ​ $ 57,687,984 Construction in progress ​ $ 305,110 ​ $ 31,737 ​ $ — ​ $ 103,537 ​ $ 440,384 Intangibles, net ​ $ — ​ $ — ​ $ 3,200,555 ​ $ 947,778 ​ $ 4,148,333 Goodwill ​ $ 1,170,511 ​ $ 1,948,875 ​ $ 5,320,416 ​ $ 4,885,211 ​ $ 13,325,013 Total segment assets ​ $ 56,425,159 ​ $ 74,771,798 ​ $ 14,470,322 ​ $ 11,210,685 ​ $ 156,877,964 Assets of discontinued operations ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 22,677,588 Total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 179,555,552 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2019 ​ Retail Bulk Services Manufacturing Total Revenue ​ $ 26,456,022 ​ $ 26,986,108 ​ $ 1,759,446 ​ $ 13,592,075 ​ $ 68,793,651 Cost of revenue ​ 11,611,165 ​ 18,606,805 ​ 1,215,193 ​ 9,086,140 ​ 40,519,303 Gross profit ​ 14,844,857 ​ 8,379,303 ​ 544,253 ​ 4,505,935 ​ 28,274,348 General and administrative expenses ​ 13,422,821 ​ 1,238,296 ​ 392,425 ​ 1,947,622 ​ 17,001,164 Gain on asset dispositions and impairments, net ​ 398,041 ​ 47,000 ​ — ​ — ​ 445,041 Income from operations ​ $ 1,820,077 ​ $ 7,188,007 ​ $ 151,828 ​ $ 2,558,313 ​ 11,718,225 Other income, net ​ ​ ​ ​ ​ 786,552 Income before income taxes ​ ​ ​ ​ ​ 12,504,777 Provision for income taxes ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 66,621 Net income from continuing operations ​ ​ ​ ​ ​ 12,438,156 Income from continuing operations attributable to non-controlling interests ​ ​ ​ ​ ​ 1,549,978 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ 10,888,178 Net income from discontinued operations ​ ​ ​ ​ ​ 1,287,915 Net income attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ $ 12,176,093 ​ Depreciation and amortization expenses for the year ended December 31, 2019 for the retail, bulk, services and manufacturing segments were $2,364,994, $3,795,320, $120,761 and $922,027, respectively. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2019 ​ Retail Bulk Services Manufacturing Total Accounts receivable, net ​ $ 2,891,165 ​ $ 18,883,493 ​ $ 678,119 ​ $ 500,882 ​ $ 22,953,659 Inventory, current and non-current ​ $ 2,668,902 ​ $ 3,628,443 ​ $ — ​ $ 1,394,588 ​ $ 7,691,933 Property, plant and equipment, net ​ $ 29,177,718 ​ $ 30,281,647 ​ $ 158,358 ​ $ 1,621,029 ​ $ 61,238,752 Construction in progress ​ $ 396,214 ​ $ 869,792 ​ $ — ​ $ 69,591 ​ $ 1,335,597 Intangibles, net ​ $ — ​ $ — ​ $ 3,877,222 ​ $ 1,162,778 ​ $ 5,040,000 Goodwill ​ $ 1,170,511 ​ $ 1,948,875 ​ $ 5,320,416 ​ $ 4,885,211 ​ $ 13,325,013 Total segment assets ​ $ 65,554,640 ​ $ 69,423,770 ​ $ 12,895,385 ​ $ 14,854,557 ​ $ 162,728,352 Assets of discontinued operations ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 29,289,022 Total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 192,017,374 ​ Revenues earned by major geographic region were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2020 2019 Cayman Islands ​ $ 25,640,169 ​ $ 30,327,139 Bahamas ​ 21,654,153 ​ 23,114,860 Indonesia ​ — ​ 131 United States ​ 24,918,527 ​ 14,968,868 Revenues earned from management services agreement with OC-BVI ​ 415,277 ​ 382,653 ​ ​ $ 72,628,126 ​ $ 68,793,651 ​ Revenues earned from major customers were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2020 2019 Revenue earned from the Water and Sewerage Corporation ("WSC") ​ $ 21,527,487 ​ $ 22,877,741 Percentage of consolidated revenue earned from the WSC ​ 30% ​ 33% Revenue earned from one manufacturing segment customer ​ $ 9,965,041 ​ $ 9,238,476 Percentage of consolidated revenue earned from the one manufacturing segment customer ​ 14% ​ 13% ​ Property, plant and equipment, net by major geographic region were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Cayman Islands ​ $ 28,474,748 ​ $ 29,059,294 The Bahamas ​ 26,975,427 ​ 30,245,741 United States ​ 2,237,809 ​ 1,933,717 ​ ​ $ 57,687,984 ​ $ 61,238,752 ​

Cost of revenues and general an

Cost of revenues and general and administrative expenses	12 Months Ended
	Dec. 31, 2020
Cost of revenues and general and administrative expenses
Cost of revenues and general and administrative expenses	15. Cost of revenue and general and administrative expenses ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Cost of revenue consist of: ​ ​ ​ ​ ​ ​ Electricity ​ $ 5,389,361 ​ $ 7,438,218 Depreciation ​ 6,202,012 ​ 6,046,810 Fuel oil ​ 4,157,393 ​ 5,315,676 Employee costs ​ 11,308,833 ​ 6,597,755 Maintenance ​ 2,859,262 ​ 2,076,501 Retail license royalties ​ 1,489,862 ​ 1,701,724 Insurance ​ 1,491,799 ​ 1,279,997 Materials ​ 5,786,698 ​ 6,151,064 Other ​ 7,174,451 ​ 3,911,558 ​ ​ $ 45,859,671 ​ $ 40,519,303 ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ 2020 ​ 2019 General and administrative expenses consist of: ​ ​ Employee costs ​ $ 10,025,658 ​ $ 9,335,247 Insurance ​ 1,436,957 ​ 866,457 Professional fees ​ 1,549,878 ​ 1,178,621 Directors’ fees and expenses ​ 865,555 ​ 969,279 Depreciation ​ 133,477 ​ 135,272 Amortization of intangible assets ​ 891,667 ​ 841,667 Other ​ 3,531,706 ​ 3,674,621 ​ ​ $ 18,434,898 ​ $ 17,001,164 ​

Stock-based compensation

Stock-based compensation	12 Months Ended
	Dec. 31, 2020
Stock-based compensation
Stock-based compensation	16. Stock-based compensation The Company has the following stock compensation plans that form part of its employees’ and Directors’ remuneration: Employee Share Incentive Plan (Preferred Stock) Employees (i.e. other than Directors and Officers), after four $nil seven days 30 days Employee Share Option Plan (Common Stock Options) The Company has an employee stock option plan for certain long-serving employees of the Company. Under the plan, these employees are granted in each calendar year, as long as the employee is a participant in the Employee Share Incentive Plan, options to purchase common shares. The price at which the option may be exercised is the closing market price on the grant date, which is the 40th day after the date of the Company’s Annual Shareholder Meeting. The number of options each employee is granted is equal to five times the sum of (i) the number of shares of preferred stock that employee receives for $nil consideration and (ii) the number of preferred stock options that employee exercises in that given year. Options may be exercised during the period commencing on the fourth anniversary of the grant date and ending on the thirtieth day after the fourth anniversary of the grant date. Options granted under this plan during the years ended December 31, 2020 and 2019 totaled 2,100 and 2,575, respectively. The fair value of each option award is estimated on the date of grant using a Black-Scholes option-pricing model that uses the assumptions noted in the table below. Expected volatilities are based on historical volatilities of the Company’s common stock. The Company uses historical data to estimate option exercise and post-vesting termination behavior. The expected term of options granted is based on historical data and represents the period of time that options granted are expected to be outstanding. The Company uses historical data to estimate stock option exercises and forfeitures within its valuation model. The risk-free interest rate for the expected term of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. 2008 Equity Incentive Plan On May 14, 2008, the Company’s stockholders approved the 2008 Equity Incentive Plan (the “2008 Plan”) and reserved 1,500,000 shares of the Company’s Class A common shares for issuance under this plan. All Directors, executives and key employees of the Company or its affiliates are eligible for participation in the 2008 Plan which provides for the issuance of options, restricted stock and stock equivalents at the discretion of the Board. Non-Executive Directors’ Share Plan This stock grant plan provides part of Directors’ remuneration. Under this plan, non-Executive Directors receive a combination of cash and common stock for their participation in Board meetings. The number of shares of common stock granted is calculated based upon the market price of the Company’s common stock on October 1 of the year preceding the grant. Common stock granted under this plan during the years ended December 31, 2020 and 2019 totaled 19,712 and 22,034 shares, respectively. The Company recognized stock-based compensation for these share grants of $318,991 and $322,036 for the years ended December 31, 2020 and 2019, respectively. The Company measures and recognizes compensation expense at fair value for all share-based payments, including stock options. Stock-based compensation for the Employee Share Incentive Plan, Employee Share Option Plan and the 2008 Equity Incentive Plan totaled $125,487 and $142,632 for the years ended December 31, 2020 and 2019, respectively, and is included in general and administrative expenses in the accompanying consolidated statements of income. The significant weighted average assumptions for the years ended December 31, 2020 and 2019 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 Risk free interest rate 0.17 % 2.11 % Expected option life (years) 1.1 1.1 ​ Expected volatility 51.19 % 34.59 % Expected dividend yield 2.42 % 2.44 % ​ A summary of the Company’s stock option activity for the year ended December 31, 2020 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ ​ ​ Exercise ​ Contractual ​ Intrinsic ​ Options Price Life (Years) Value (1) Outstanding at beginning of period 10,650 ​ $ 13.08 ​ Granted 8,223 ​ 10.67 ​ Exercised (835) ​ 10.10 ​ Forfeited/expired (8,008) ​ 11.04 ​ Outstanding as of December 31, 2020 10,030 ​ $ 12.98 2.07 years $ — Exercisable as of December 31, 2020 — ​ $ — — years $ — (1) The intrinsic value of a stock option represents the amount by which the fair value of the underlying stock, measured by reference to the closing price of the common shares of $12.05 on the Nasdaq Global Select Market on December 31, 2020, exceeds the exercise price of the option. As of December 31, 2020, 10,030 non-vested options were outstanding, with weighted average exercise price of $12.98, and average remaining contractual life of 2.07 years. The total remaining unrecognized compensation costs related to unvested stock-based arrangements were $14,427 as of December 31, 2020 and are expected to be recognized over a weighted average period of 2.07 years. As of December 31, 2020, unrecognized compensation costs relating to redeemable preferred stock rights outstanding were $142,328 and are expected to be recognized over a weighted average period of 1.15 years. The following table summarizes the weighted average fair value of options at the date of grant and the intrinsic value of options exercised during the years ended December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 Options granted with an exercise price below market price on the date of grant: ​ ​ Employees — preferred stock ​ $ 2.70 ​ $ 3.73 Overall weighted average ​ 2.70 ​ 3.73 ​ ​ ​ ​ ​ ​ ​ Options granted with an exercise price at market price on the date of grant: ​ ​ Management employees ​ $ — ​ $ — Employees — common stock ​ 2.45 ​ 3.23 Overall weighted average ​ 2.45 ​ 3.23 ​ ​ ​ ​ ​ ​ ​ Options granted with an exercise price above market price on the date of grant: ​ ​ Management employees ​ $ — ​ $ — Employees — preferred stock ​ — ​ — Overall weighted average ​ — ​ — ​ ​ ​ ​ ​ ​ ​ Total intrinsic value of options exercised ​ $ 3,891 ​ $ 5,857 ​ Executive Long-Term Incentive Compensation The Board of Directors approved changes to the long-term incentive compensation for the Company’s Executive Officers effective for 2015 and thereafter to better align the interests of its Executive Officers with those of its shareholders. The revised long-term compensation plan includes a combination of performance and non-performance-based grants of common stock from the shares of Company stock provided for issuance under the 2008 Equity Incentive Plan. The non-performance-based stock grants vest in one-third increments at the end of each year over a three and 2019, respectively and the shares associated with these grants were issued in 2021 and 2020, respectively. The Company recognized $344,940 and $337,032 in stock-based compensation expense related to these non-performance stock grants for the years ended December 31, 2020 and 2019, respectively. The performance-based grants may be earned at the end of each year based upon the Company's three three A total of 31,788 common stock grants were earned as of December 31, 2020 based upon the Company’s actual financial performance relative to the cumulative financial performance targets for the three A total of 36,007 common stock grants were earned as of December 31, 2019 based upon the Company’s actual financial performance relative to the cumulative financial performance targets for the three

Retirement benefits

Retirement benefits	12 Months Ended
	Dec. 31, 2020
Retirement benefits
Retirement benefits	17. Retirement benefits Retirement plans are offered to all employees in California, Florida, Cayman Islands and Bahamas. The plans are administered by third parties and are defined contribution plans pursuant to which the Company matches participating employees’ contributions up to certain amounts. The Company matches contributions of up to 5% of a maximum salary amount of $104,400 for Cayman Islands employees, fully matches all contributions made by employees in the Bahamas, and matches contributions of up to 6% of salary for Florida employees. For California employees, the Company matches contribution amounts up to 2% of the employee's salary and matches 25% of contributions above this 2% threshold, up to 10% of the employee’s salary. The Company’s expense for these plans was $576,096 and $450,732 for the years ended December 31, 2020 and 2019, respectively.

Financial instruments

Financial instruments	12 Months Ended
	Dec. 31, 2020
Financial instruments
Financial instruments	18. Financial instruments Credit risk: The Company is not exposed to significant credit risk on its retail customer accounts as its policy is to cease supply of water to customers’ accounts that are more than 45 days Interest rate risk: The Company is not subject to significant interest-rate risk arising from fluctuations in interest rates. Foreign exchange risk: All relevant foreign currencies other than the Mexican peso and the euro have been fixed to the dollar for more than 20 years Fair values: As of December 31, 2020 and 2019, the carrying amounts of cash equivalents, accounts receivable, accounts payable, accrued expenses, accrued compensation, dividends payable and other current liabilities approximate their fair values due to the short-term maturities of these instruments. Under US GAAP, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. US GAAP guidance also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability and are developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would use in valuing the asset or liability. The guidance establishes three levels of inputs that may be used to measure fair value: Level 1 - Quoted prices in active markets for identical assets or liabilities. Level 2 - Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurements. The Company reviews its fair value hierarchy classifications on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy. The following table presents the Company’s fair value hierarchy for assets and liabilities measured at fair value as of December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Level 1 Level 2 Level 3 Total Liabilities: ​ ​ ​ ​ ​ Recurring ​ ​ ​ ​ ​ Net liability arising from put/call options ​ $ — ​ $ — ​ $ 690,000 ​ $ 690,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Level 1 Level 2 Level 3 Total Liabilities: ​ ​ ​ ​ ​ Recurring ​ ​ ​ ​ ​ Net liability arising from put/call options ​ $ — ​ $ — ​ $ 664,000 ​ $ 664,000 ​ The activity for the Level 3 asset for the year ended December 31, 2020: ​ ​ ​ ​ ​ Net liability arising from put/call options ​ ​ Balance as of December 31, 2019 ​ $ 664,000 Unrealized loss ​ 26,000 Balance as of December 31, 2020 ​ $ 690,000 ​ Put/call options are reported at fair value as either assets or liabilities in the consolidated balance sheets. These fair values are calculated using discounted cash flow analysis valuation techniques that incorporate unobservable inputs, such as future cash flows, weighted-average cost of capital, and expected future volatility. The inputs to these valuations are considered Level 3 inputs. ​

Commitments and contingencies

Commitments and contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and contingencies.
Commitments and contingencies	19. Commitments and contingencies Commitments The Company has entered into employment agreements with certain executives, which expire through December 31, 2023 and provide for, among other things, base annual salaries in an aggregate amount of approximately $4.7 million, performance bonuses and various employee benefits. The Company has purchase obligations totaling approximately $1.8 million through December 31, 2021. Contingencies COVID-19 The worldwide coronavirus (COVID-19) pandemic was formally recognized by the World Health Organization on March 11, 2020. In response to this pandemic, the governments of the countries in which the Company operates - the Cayman Islands, The Bahamas, and the United States - implemented preventative measures to slow the spread of COVID-19, measures which have had profound adverse consequences for the economies of those countries. Tourism, a major economic driver for the Cayman Islands and The Bahamas, has temporarily ceased in those countries due to closing of these countries to air and sea travel. Overall economic activity in the United States has declined. As a result of the impact of the COVID-19 pandemic on the economies of the countries in which the Company operates, the Company has experienced, and could continue to experience decreases in consolidated revenue, cash flows generated from operations, and overall liquidity as compared to comparable prior periods. Furthermore, a prolonged extension of the economic downturn created by the COVID-19 pandemic could adversely affect the markets for the Company’s products and services. Such adverse market effects could adversely impact the Company’s expected future cash flows from its four reporting units and could require the Company to record impairment losses to reduce the carrying values of one or more of these reporting units due to a decline in their fair values. Although the Company cannot presently quantify the future financial impacts of the COVID-19 pandemic, such impacts will likely have a material adverse impact on the Company’s consolidated financial condition, results of operations, and cash flows. Given the uncertainty associated with the resolution of this pandemic, the Company cannot presently determine how long such adverse financial impacts may last. Cayman Water The Company sells water through its retail operations under a license issued in July 1990 by the Cayman Islands government (the “1990 license”) that granted Cayman Water the exclusive right to provide potable water to customers within its licensed service area. Although the 1990 license was not expressly extended after January 2018, the Company continues to supply water under the terms of the 1990 license, as further discussed in the following paragraph. Pursuant to the 1990 license, Cayman Water has the exclusive right to produce potable water and distribute it by pipeline to its licensed service area, which consists of two of the three most populated areas of Grand Cayman Island: Seven Mile Beach and West Bay. In 2020 and 2019, we generated approximately 32% and 38%, respectively, of our consolidated revenue and 44% and 53%, respectively, of our consolidated gross profit from the retail water operations conducted under the 1990 license. ​ The 1990 license was originally scheduled to expire in July 2010 but was extended several times by the Cayman Islands government in order to provide the parties with additional time to negotiate the terms of a new license agreement. The most recent express extension of the 1990 license expired on January 31, 2018. The Company continues to operate under the terms of the 1990 license, providing water services to the level and quality specified in the 1990 license and in accordance with its understanding of its legal obligations, treating those obligations set forth in the 1990 license as operative notwithstanding the expiration of the express extension. The Company continues to pay the royalty required under the 1990 license. In October 2016, the Government of the Cayman Islands passed legislation which created a new utilities regulation and competition office (“OfReg”). OfReg is an independent and accountable regulatory body with a view of protecting the rights of consumers, encouraging affordable utility services and promoting competition. OfReg, which began operations in January 2017, has the ability to supervise, monitor and regulate multiple utility undertakings and markets. Supplemental legislation was passed by the Government of the Cayman Islands in April 2017, which transferred responsibility for economic regulation of the water utility sector and the negotiations with the Company for a new retail license from the WAC to OfReg in May 2017. The Company began license negotiations with OfReg in July 2017 and such negotiations are ongoing. The Company has been informed during its retail license negotiations, both by OfReg and its predecessor in these negotiations, that the Cayman Islands government seeks to restructure the terms of its license in a manner that could significantly reduce the operating income and cash flows the Company has historically generated from its retail license. The Company is presently unable to determine what impact the resolution of its retail license negotiations will have on its cash flows, financial condition or results of operations but such resolution could result in a material reduction (or the loss) of the operating income and cash flows the Company has historically generated from Cayman Water’s retail operations and could require the Company to record impairment losses to reduce the carrying values of its retail segment assets. Such impairment losses could have a material adverse impact on the Company’s consolidated financial condition and results of operations. CW-Bahamas CW-Bahamas’ accounts receivable balances (including accrued interest) due from the WSC amounted to $16.8 million and $18.4 million as of December 31, 2020 and 2019, respectively. Historically, CW-Bahamas has experienced delays in collecting its accounts receivable from the WSC. When these delays occur, the Company holds discussions and meetings with representatives of the WSC and The Bahamas government, and as a result, payment schedules are developed for WSC’s delinquent accounts receivable. All previous delinquent accounts receivable from the WSC were eventually paid in full. Based upon this payment history, CW-Bahamas has never been required to provide an allowance for doubtful accounts for any of its accounts receivable, despite the periodic accumulation of significant delinquent balances. As of December 31, 2020, the Company has not provided an allowance for doubtful accounts for CW-Bahamas’ accounts receivable from the WSC. If CW-Bahamas continues to be unable to collect a significant portion of its delinquent accounts receivable, one or more of the following events may occur: (i) CW-Bahamas may not have sufficient liquidity to meet its obligations; (ii) the Company may be required to cease the recognition of revenue on CW-Bahamas’ water supply agreements with the WSC; and (iii) the Company may be required to provide an allowance for doubtful accounts for CW-Bahamas’ accounts receivable. Any of these events could have a material adverse impact on the Company’s consolidated financial condition, results of operations, and cash flows.

Acquisition of PERC

Acquisition of PERC	12 Months Ended
	Dec. 31, 2020
Acquisition of PERC
Acquisition of PERC	20. Acquisition of PERC On October 24, 2019, the Company, through its wholly-owned subsidiary, CW-Holdings, entered into a stock purchase agreement (the “Purchase Agreement”) with PERC and its various shareholders (collectively, the “Sellers”). Pursuant to the terms of the Purchase Agreement, CW-Holdings purchased a 51% ownership interest in PERC for approximately $4.1 million in cash. After giving effect to the transactions contemplated by the Purchase Agreement, CW-Holdings owned 51% of the outstanding capital stock of PERC, and three members of PERC's management and one additional shareholder (the “Remaining Shareholders”) owned the remaining 49% of the outstanding capital stock of PERC. In August 2020, CW-Holdings acquired an additional 10% of PERC for $900,000 increasing the Company’s ownership to 61% of the outstanding capital stock of PERC. The remaining 39% is still owned by three members of PERC's management and one additional shareholder. CW-Holdings also acquired from the Remaining Shareholders an option to compel the Remaining Shareholders to sell, and granted to the Remaining Shareholders an option to require CW-Holdings to purchase, the Remaining Shareholders’ 39% ownership interest in PERC at a price based upon the fair market value of PERC at the time of the exercise of the option. CW-Holdings’ option is exercisable on or after October 24, 2022 and the Remaining Shareholders’ option is exercisable on or after October 24, 2024. PERC is a water infrastructure company headquartered in Fountain Valley, California that develops, designs, builds, and manages wastewater and water reuse infrastructure. In connection with the Purchase Agreement, CW-Holdings, and the Remaining Shareholders entered into a shareholders' agreement, pursuant to which CW-Holdings and the Remaining Shareholders agreed to certain rights and obligations with respect to the governance of PERC. The purchase price for PERC is summarized as follows: ​ ​ ​ ​ ​ Cash consideration ​ Purchase price (excluding working capital) ​ $ 4,088,817 Cash acquired ​ (941,379) Total cash consideration ​ $ 3,147,438 ​ The following table summarizes the estimated fair values of the assets and liabilities assumed at the acquisition date: ​ ​ ​ ​ ​ Financial assets $ 1,371,532 Contract assets ​ 20,854 Property, plant and equipment ​ 86,287 Identifiable intangible assets ​ 3,990,000 Deferred tax liability ​ ​ (1,117,200) Accounts payable and accrued liabilities ​ (1,260,722) Working capital adjustment payable ​ (23,467) Deferred revenue ​ (117,636) Contract liabilities ​ (760,992) Net liability arising from put/call options ​ (744,000) Total identifiable net assets ​ 1,444,656 Non-controlling interest in PERC ​ (3,617,634) Goodwill ​ 5,320,416 ​ ​ $ 3,147,438 ​ The fair value of noncontrolling interest was calculated using the discounted cash flow method. The discounted cash flow method relied upon nine-year discrete projections of operating results, working capital and capital expenditures, along with a terminal value subsequent to the discrete period. These projections were based upon historical and anticipated future results, general economic and market conditions, and considered the impact of planned business and operational strategies. The discount rates for the calculations represented the estimated cost of capital for market participants at the time of each analysis. An 8.4% discount for marketability was applied to the noncontrolling interest calculated under the discounted cash flow method. This marketability discount was calculated using an average-price put option model. ​ The identifiable intangible assets consisted of the following items: ​ ​ ​ ​ ​ ​ ​ ​ Amount Useful life Non-compete agreement ​ $ 130,000 3 years Trade name ​ 1,300,000 15 years Customer backlog ​ 360,000 2 years Facility management contracts ​ 2,200,000 6 years ​ ​ $ 3,990,000 ​ ​ ​ The results of operations of PERC included in the Company’s results of operations for the period October 24, 2019 to December 31, 2019 are as follows: ​ ​ ​ ​ ​ Revenue ​ $ 1,376,793 Gross profit ​ 407,604 Amortization of intangibles, net of tax benefit ​ (81,200) Net income ​ 37,924 ​ The following unaudited pro forma financial information presents the results of operations of the Company for the year ended December 31, 2019, as if the acquisition of PERC had taken place on January 1, 2019. These pro forma results have been prepared for comparative purposes only and do not purport to be indicative of the results of operations which would have actually occurred had the transaction taken place on January 1, 2019, nor do they purport to be indicative of future results of operations. ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2019 Revenue $ 77,615,958 Cost of revenue ​ 47,162,564 Gross profit ​ 30,453,394 General and administrative expenses ​ 21,620,106 Gain (loss) on asset dispositions and impairments, net ​ 447,681 Income from operations ​ 9,280,969 Other income (expense), net ​ 805,093 Income before income taxes ​ 10,086,062 Provision for (benefit from) income taxes ​ 72,814 Net income from continuing operations ​ 10,013,248 Income from continuing operations attributable to non-controlling interests ​ 1,505,068 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ 8,508,180 Gain on sale of discontinued operations ​ 3,621,170 Net income from discontinued operations ​ — Total income from discontinued operations ​ 3,621,170 Net income attributable to Consolidated Water Co. Ltd. stockholders ​ $ 12,129,350 ​ ​ ​ ​ Basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ Continuing operations ​ $ 0.57 Discontinued operations ​ 0.24 Basic earnings per share ​ $ 0.81 ​ ​ ​ ​ Diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ Continuing operations ​ $ 0.56 Discontinued operations ​ 0.24 Diluted earnings per share ​ $ 0.80 ​ ​ ​ ​ Weighted average number of common shares used in the determination of: ​ Basic earnings per share ​ 15,025,639 Diluted earnings per share ​ 15,137,076 ​

Related party transactions

Related party transactions	12 Months Ended
	Dec. 31, 2020
Related party transactions
Related party transactions	​ 21. Related party transactions ​ The Company, through PERC and the services segment, purchases engineering and technology support services from various companies with a minority shareholder who is also a minority shareholder of PERC. During the years ended December 31, 2020 and 2019, the Company made total purchases of services of approximately $1,349,000 and $10,000 from these companies, respectively. These total purchases are included in the Company’s cost of revenues in the accompanying consolidated statements of income

Supplemental disclosure of cash

Supplemental disclosure of cash flow information	12 Months Ended
	Dec. 31, 2020
Supplemental disclosure of cash flow information
Supplemental disclosure of cash flow information	22. Supplemental disclosure of cash flow information ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Interest paid in cash ​ $ 9,669 ​ $ 1,332 ​ ​ ​ ​ ​ ​ ​ Non-cash transactions: ​ ​ ​ Dividends declared but not paid ​ $ 1,289,854 ​ $ 1,282,086 Transfers from inventory to property, plant and equipment and construction in progress ​ $ 73,464 ​ $ 443,018 Transfers from construction in progress to property, plant and equipment ​ $ 1,653,501 ​ $ 7,755,375 Right-of-use assets obtained in exchange for new operating lease liabilities ​ $ 299,992 ​ $ 2,429,305 Purchase of equipment through issuance of long term debt ​ $ 122,292 ​ $ 78,899 ​

Impact of recent accounting sta

Impact of recent accounting standards	12 Months Ended
	Dec. 31, 2020
Impact of recent accounting standards
Impact of recent accounting standards	23. Impact of recent accounting standards Adoption of New Accounting Standards: None. Effect of newly issued but not yet effective accounting standards: In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848), which provides optional expedients and exceptions to the current guidance on contract modifications and hedging relationships to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative reference rates. The guidance was effective upon issuance and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. The Company is currently evaluating the impact of the new guidance on the consolidated financial statements, however the adoption of this standard is not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

Subsequent events

Subsequent events	12 Months Ended
	Dec. 31, 2020
Subsequent events
Subsequent events	24. Subsequent events The Company evaluated subsequent events through the time of the filing of its Annual Report on Form 10-K. Other than as disclosed in these consolidated financial statements, the Company is not aware of any significant events that occurred subsequent to the balance sheet date but prior to the filing of this report that would have a material impact on its consolidated financial statements.

Accounting policies (Policies)

Accounting policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting policies
Basis of preparation	Basis of preparation:
Use of estimates	Use of estimates:
Basis of consolidation	Basis of consolidation: On January 24, 2020, as a result of CW-Holdings' exercise of a call option, CW-Holdings purchased the remaining 49% ownership interest in Aerex for $8,500,000 in cash. After giving effect to this purchase, CW-Holdings owns 100% of the outstanding capital stock of Aerex. On August 11, 2020, CW-Holdings purchased an additional 10% of the ownership of PERC for $900,000 , increasing its ownership of this subsidiary to 61% .
Foreign currency	Foreign currency:
Cash and cash equivalents	Cash and cash equivalents: include $8.5 million and $12.7 million, respectively, of certificates of deposits with an original maturity of three months or less. As of December 31, 2020, the Company had deposits in U.S. banks in excess of federally insured limits of approximately $10.3 million. As of December 31, 2020, the Company held cash in foreign bank accounts of approximately $32.8 million. Certain transfers from the Company’s Bahamas bank accounts to Company bank accounts in other countries require the approval of the Central Bank of The Bahamas. As of December 31, 2020, the equivalent United States dollar cash balances for deposits held in The Bahamas were approximately $15.9 million.
Accounts receivable and allowance for doubtful accounts	Accounts receivable and allowance for doubtful accounts: Trade accounts receivable also represent our unconditional right, subject only to the passage of time, to receive consideration arising from our performance under contracts with customers. Trade accounts receivable include amounts billed and billable on construction contracts, service and maintenance contracts and contracts for the sale of goods. Billed contract receivables have been invoiced to customers based on contracted amounts.
Inventory	Inventory:
Contract assets and liabilities	Contract assets and liabilities : Billing practices for the Company’s contracts are governed by the contract terms of each project based upon costs incurred, achievement of milestones or predetermined schedules. Billings do not necessarily correlate with revenue recognized over time using the direct inputs method of accounting. Contract assets, which include costs and estimated earnings in excess of billings on uncompleted contracts, arise when the Company recognizes revenue for services performed under its construction and manufacturing contracts, but the Company is not yet entitled to bill the customer under the terms of the contract. Contract liabilities, which include billings in excess of costs and estimated earnings on uncompleted contracts, represent the Company's obligation to transfer goods or services to a customer for which the Company has been paid by the customer or for which the Company has billed the customer under the terms of the contract. Revenue for future services reflected in this account are recognized, and the liability is reduced, as the Company subsequently satisfies the performance obligation under the contract. ​ Costs and estimated earnings in excess of billings on uncompleted contracts and billings in excess of costs and estimated earnings on uncompleted contracts are typically resolved within one year and are not considered The Company considers retention that is withheld on progress billings as not creating an unconditional right to payment until contractual milestones are reached (typically substantial completion). Accordingly, withheld retention is considered a component of contracts assets and liabilities until finally billed to the customer, when obligations have been satisfied and the right to receipt is subject only to the passage of time. The Company’s contract assets and liabilities are reported in a net asset or liability position on a contract-by-contract basis at the end of each reporting period. The Company classifies contract assets and liabilities related to construction and manufacturing contracts in current assets and current liabilities as they will be liquidated in the normal course of contract completion, although this may require more than one year.
Property, plant and equipment, net	Property, plant and equipment, net: ​ ​ ​ ​ Buildings 5 to 40 years Plant and equipment 4 to 40 years Distribution system 3 to 40 years Office furniture, fixtures and equipment 3 to 10 years Vehicles 3 to 10 years Leasehold improvements Shorter of 5 years or lease term Lab equipment 5 to 10 years ​ Additions to property, plant and equipment are comprised of the cost of the contracted services, direct labor and materials. Assets under construction are recorded as additions to property, plant and equipment upon completion of the projects. Depreciation commences in the month the asset is placed in service. Interest costs directly attributable to the acquisition and construction of qualifying assets, which are assets that necessarily take a substantial amount of time to be ready for their intended use, are added to the cost of those assets until such time as the assets are substantially ready for use. No interest was capitalized during the years ended December 31, 2020 or 2019.
Long-lived assets	Long-lived assets:
Goodwill and intangible assets	Goodwill and intangible assets: ​ For the years ended December 31, 2020 and 2019, the Company estimated the fair value of its reporting units by applying the discounted cash flow method, which relied upon seven-year discrete projections of operating results, working capital and capital expenditures, along with a terminal value subsequent to the discrete period. These seven-year projections were based upon historical and anticipated future results, general economic and market conditions, and considered the impact of planned business and operational strategies. The discount rates for the calculations represented the estimated cost of capital for market participants at the time of each analysis. ​ The Company also estimated the fair value of each of it reporting units for the years ended December 31, 2020 and 2019 by applying the guideline public company method. The Company also estimated the fair value of each of its reporting units for the year ended December 31, 2019 by referencing the market multiples implied by guideline merger and acquisition transactions (the mergers and acquisition method). The Company considered utilizing the mergers and acquisition method for the year ended December 31, 2020 but due to a lack of relevant meaningful mergers and acquisition activity during the year, such method was not utilized for 2020. ​ The Company weighted the fair values estimated for each of its reporting units under each method and summed such weighted fair values to estimate the overall fair value for each reporting unit. The respective weightings the Company applied to each method for the years ended December 31 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 Method Retail Bulk Services Manufacturing Discounted cash flow 80 % 80 % 80 % 80 % Guideline public company 20 % 20 % 20 % 20 % Mergers and acquisitions — % — % — % — % ​ 100 % 100 % 100 % 100 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2019 Method Retail Bulk Manufacturing Discounted cash flow 80 % 80 % 80 % Guideline public company 10 % 10 % 10 % Mergers and acquisitions 10 % 10 % 10 % ​ 100 % 100 % 100 % ​ The fair values the Company estimated for its retail, bulk, services and manufacturing reporting units exceeded their carrying amounts by 101%, 49%, 17%, and 31% respectively, as of December 31, 2020. The fair values the Company estimated for its retail and bulk reporting units exceeded their carrying amounts by 74% and 58%, respectively, as of December 31, 2019. The assets and liabilities for the Companys’ services reporting unit consist almost entirely of those for PERC, which was acquired on October 24, 2019, and therefore the Company estimated that the fair value of its services reporting unit closely approximated its carrying value as of December 31, 2019. The Company’s manufacturing reporting unit consists entirely of Aerex and the remaining 49% ownership interest of Aerex was purchased on January 24, 2020 for $8,500,000. The Company considered this purchase, the manufacturing reporting unit’s results of operations for the year ended December 31, 2019, its projected results of operations for the year ending December 31, 2020, and the amount by which its estimated fair value exceeded its carrying amount as of December 31, 2018 to determine that it is more likely than not that the fair value of the manufacturing reporting unit exceeded its carrying amount as of December 31, 2019. ​ On February 11, 2016, the Company acquired 51% ownership interest in Aerex. In connection with this acquisition the Company recorded goodwill of $8,035,211. Aerex’s actual results of operations for the six months in 2016 following the acquisition fell significantly short of the projected results for this period that were included in the cash flow projections the Company utilized to determine the purchase price for Aerex and the fair values of its assets and liabilities. Due to this shortfall in Aerex’s results of operations, the Company tested Aerex’s goodwill for possible impairment as of September 30, 2016 by estimating its fair value using the discounted cash flow method. As a result of this impairment testing, the Company determined that the carrying value of the Aerex goodwill exceeded its fair value and recorded an impairment loss of $1,750,000 for the three months ended September 30, 2016, included in loss on long-lived asset dispositions and impairments, net in the accompanying consolidated statements of income, to reduce the carrying value of this goodwill to $6,285,211. As part of the Company’s annual impairment testing of goodwill performed during the fourth quarter, in 2017 the Company updated its projections for Aerex’s future cash flows, determined that the carrying value of the Aerex goodwill exceeded its fair value, and recorded an impairment loss of $1,400,000 for the three months ended December 31, 2017, which is included in loss on long-lived asset dispositions and impairments, net in the accompanying consolidated statements of income, to further reduce the carrying value of the goodwill to $4,885,211. ​ Approximately 80% and 68% of Aerex’s revenue, and 89% and 68% of Aerex’s gross profit, for the years ended December 31, 2020 and 2019, respectively, were generated from sales to one customer. In October 2020, this customer verbally informed Aerex that, for inventory management purposes, it was suspending its purchases from Aerex following 2020 for a period of approximately one year. This customer has verbally informed Aerex that it presently expects to recommence its purchases from Aerex beginning with the first quarter of 2022. However, the Company can offer no assurances that this customer will recommence its purchases from Aerex at that time. Furthermore, any such future purchases (should they occur) may not generate as much revenue and gross profit as Aerex has historically earned from this customer. The Company is seeking to replace the anticipated loss in revenue and gross profit from this customer by increasing sales of other products that it manufactures to new and existing customers, however, it may not be able to do so. ​ As a result of this anticipated loss of revenue for Aerex, the Company updated its projections for the manufacturing reporting unit’s future cash flows. Such projections assume, in part, that Aerex’s major customer will recommence its purchases from Aerex in 2022 but at a reduced aggregate amount, as compared to 2020 and 2019. Based upon these updated projections, the Company tested its manufacturing reporting unit’s goodwill for possible impairment as of December 31, 2020. As a result of this impairment testing, it determined that the estimated fair value of the manufacturing reporting unit exceeded its carrying value as of December 31, 2020. However, the Company may be required to record an impairment loss in the future to reduce the carrying value of the manufacturing reporting unit’s goodwill should it be determined that Aerex’s future net cash inflows will be less than the Company’s most current expectations. Any such impairment loss could have a material adverse impact on its consolidated financial condition and results of operations. ​ In February 2019, the Company sold its former Belize subsidiary (see Note 8) As a result of this sale, this former subsidiary has been accounted for as discontinued operations in the consolidated financial statements, and bulk segment goodwill of approximately $380,000 as of December 31, 2018 associated with this former subsidiary was reclassified to long-term assets of discontinued operations in the consolidated statements of financial condition.
Investments	Investments:
Other assets	Other assets:
Income taxes	Income taxes: ​ The Company is not presently subject to income taxes in the other countries in which it operates.
Revenue recognition	Revenue recognition: ​ The following table presents the Company’s revenue disaggregated by revenue source. ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Retail revenue ​ $ 22,952,370 ​ $ 26,456,022 Bulk revenue ​ 24,312,546 ​ 26,986,108 Services revenue ​ 12,937,859 ​ 1,759,446 Manufacturing revenue ​ 12,425,351 ​ 13,592,075 Total revenue ​ $ 72,628,126 ​ $ 68,793,651 ​ Retail revenue The Company produces and supplies water to end-users, including residential, commercial and governmental customers in the Cayman Islands under an exclusive retail license issued to Cayman Water by the Cayman Islands government to provide water in two of the three most populated areas on Grand Cayman Island. Customers are billed on a monthly basis based on metered consumption and bills are typically collected within 30 to 35 days after the billing date. Receivables not collected within 45 days subject the customer to disconnection from water service. In 2020 and 2019, bad debts represented less than 1% of the Company’s total retail sales. The Company recognizes revenue from water sales at the time water is supplied to the customer’s premises. The amount of water supplied is determined and invoiced based upon water meter readings performed at the end of each month. All retail water contracts are month-to-month contracts. The Company has elected the “right to invoice” practical expedient for revenue recognition on its retail water sale contracts and recognizes revenue in the amount to which the Company has a right to invoice. Bulk revenue The Company produces and supplies water to government-owned distributors in the Cayman Islands and The Bahamas. OC-Cayman provides bulk water to the Water Authority-Cayman (“WAC”), a government-owned utility and regulatory agency, under two agreements. The WAC in turn distributes such water to properties in Grand Cayman outside of Cayman Water’s retail license area. The Company sells bulk water in The Bahamas through its majority-owned subsidiary, CW-Bahamas, under two agreements with the Water and Sewerage Corporation of The Bahamas (“WSC”), which distributes such water through its own pipeline system to residential, commercial and tourist properties on the Island of New Providence. CW-Bahamas also sold water to a private resort on Bimini through December 18, 2020, which generated revenue of approximately $127,000 and $237,000 for the years ended December 31, 2020 and 2019, respectively. The Company has elected the “right to invoice” practical expedient for revenue recognition on its bulk water sale contracts and recognizes revenue in the amount to which the Company has a right to invoice. Services and Manufacturing revenue The Company provides design, engineering, management, procurement and construction services for desalination infrastructure through DesalCo, which serves customers in the Cayman Islands, The Bahamas and the British Virgin Islands. The Company also develops, builds, sells, operates and manages water, wastewater and water reuse infrastructure through PERC. All of PERC's customers are companies or governmental entities located in the U.S. The Company, through Aerex, is a custom and specialty manufacturer of water treatment-related systems and products applicable to commercial, municipal and industrial water production. Substantially all of Aerex’s customers are U.S. companies. The Company generates services revenue from DesalCo and PERC and generates manufacturing revenue from Aerex. The Company recognizes revenue for its construction and specialized/custom manufacturing contracts The Company has elected the “right to invoice” practical expedient for revenue recognition on its services agreements and recognizes revenue in the amount to which the Company has a right to invoice. Practical Expedients and Exemptions The Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which the Company recognizes revenue at the amount to which it has the right to invoice for services performed.
Comparative amounts	Comparative amounts:

Accounting policies (Tables)

Accounting policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting policies
Schedule of Estimated useful lives	Rates are determined based on the estimated useful lives of the assets as follows: ​ ​ ​ ​ Buildings 5 to 40 years Plant and equipment 4 to 40 years Distribution system 3 to 40 years Office furniture, fixtures and equipment 3 to 10 years Vehicles 3 to 10 years Leasehold improvements Shorter of 5 years or lease term Lab equipment 5 to 10 years
Schedule of Estimated fair value of reporting segment	The respective weightings the Company applied to each method for the years ended December 31 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 Method Retail Bulk Services Manufacturing Discounted cash flow 80 % 80 % 80 % 80 % Guideline public company 20 % 20 % 20 % 20 % Mergers and acquisitions — % — % — % — % ​ 100 % 100 % 100 % 100 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2019 Method Retail Bulk Manufacturing Discounted cash flow 80 % 80 % 80 % Guideline public company 10 % 10 % 10 % Mergers and acquisitions 10 % 10 % 10 % ​ 100 % 100 % 100 %
Schedule of Disaggregation of revenue	The following table presents the Company’s revenue disaggregated by revenue source. ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Retail revenue ​ $ 22,952,370 ​ $ 26,456,022 Bulk revenue ​ 24,312,546 ​ 26,986,108 Services revenue ​ 12,937,859 ​ 1,759,446 Manufacturing revenue ​ 12,425,351 ​ 13,592,075 Total revenue ​ $ 72,628,126 ​ $ 68,793,651 ​

Cash and cash equivalents (Tabl

Cash and cash equivalents (Tables)	12 Months Ended
	Dec. 31, 2020
Cash and cash equivalents
Schedule of Cash and cash equivalents	Cash and cash equivalents are not restricted by the terms of the Company’s bank accounts as to withdrawal or use. As of December 31, 2020 and 2019, the equivalent United States dollars are denominated in the following currencies: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Bank accounts: ​ ​ United States dollar ​ $ 14,001,264 ​ $ 15,661,140 Cayman Islands dollar ​ 5,650,874 ​ 6,690,274 Bahamian dollar ​ 14,863,287 ​ 6,353,936 Bermudian dollar ​ 2,832 ​ 3,084 ​ ​ 34,518,257 ​ 28,708,434 ​ ​ ​ ​ ​ ​ ​ Short term deposits: ​ ​ United States dollar ​ 5,796,582 ​ 11,100,185 Cayman Islands dollar ​ 2,413,547 ​ 1,209,954 Bahamian dollar ​ 1,065,764 ​ 1,052,510 ​ ​ 9,275,893 ​ 13,362,649 Total cash and cash equivalents ​ $ 43,794,150 ​ $ 42,071,083 ​

Accounts receivable, net (Table

Accounts receivable, net (Tables)	12 Months Ended
	Dec. 31, 2020
Accounts receivable, net.
Schedule of Accounts receivable	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Trade accounts receivable ​ $ 21,422,782 ​ $ 22,862,706 Receivable from OC-BVI ​ 62,171 ​ 10,808 Other accounts receivable ​ 269,133 ​ 222,381 ​ ​ 21,754,086 ​ 23,095,895 Allowance for doubtful accounts ​ (270,110) ​ (142,236) Accounts receivable, net ​ $ 21,483,976 ​ $ 22,953,659 ​
Schedule of Allowance for doubtful accounts	The activity for the allowance for doubtful accounts consisted of: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Opening allowance for doubtful accounts ​ $ 142,236 ​ $ 158,902 Provision for doubtful accounts ​ 129,107 ​ — Accounts written off during the year ​ (1,233) ​ (16,666) Ending allowance for doubtful accounts ​ $ 270,110 ​ $ 142,236 ​

Inventory (Tables)

Inventory (Tables)	12 Months Ended
	Dec. 31, 2020
Inventory
Schedule of Inventory	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Water stock ​ $ 27,938 ​ $ 33,694 Consumables stock ​ 105,540 ​ 118,286 Spare parts stock ​ 7,587,542 ​ 7,539,953 Total inventory ​ 7,721,020 ​ 7,691,933 Less current portion ​ 3,214,178 ​ 3,287,555 Inventory (non-current) ​ $ 4,506,842 ​ $ 4,404,378

Contracts in progress (Tables)

Contracts in progress (Tables)	12 Months Ended
	Dec. 31, 2020
Contracts in progress
Summary of information relative to revenue recognized and amounts billed on contracts in progress	Revenue recognized and amounts billed on contracts in progress are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2020 ​ 2019 Revenue recognized to date on contracts in progress ​ $ 17,534,449 $ 16,054,699 Amounts billed to date on contracts in progress ​ (17,791,928) ​ (15,078,830) Retainage ​ ​ 312,130 ​ ​ 361,556 Net contract asset ​ $ 54,651 ​ $ 1,337,425 ​ The above net balances are reflected in the accompanying consolidated balance sheet as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2020 ​ 2019 Contract assets ​ $ 516,521 $ 1,677,041 Contract liabilities ​ (461,870) ​ (339,616) Net contract asset ​ $ 54,651 ​ $ 1,337,425

Property, plant and equipment_2

Property, plant and equipment and construction in progress (Tables)	12 Months Ended
	Dec. 31, 2020
Property, plant and equipment and construction in progress
Schedule of Property, plant and equipment and construction in progress	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Land ​ $ 3,566,537 ​ $ 3,566,537 Buildings ​ 23,250,843 ​ 23,176,106 Plant and equipment ​ 63,734,860 ​ 64,840,636 Distribution system ​ 39,149,063 ​ 36,538,614 Office furniture, fixtures and equipment ​ 3,079,362 ​ 3,038,589 Vehicles ​ 1,999,463 ​ 1,582,053 Leasehold improvements ​ 274,230 ​ 272,092 Lab equipment ​ 12,456 ​ 14,958 ​ ​ 135,066,814 ​ 133,029,585 Less accumulated depreciation ​ 77,378,830 ​ 71,790,833 Property, plant and equipment, net ​ $ 57,687,984 ​ $ 61,238,752 Construction in progress ​ $ 440,384 ​ $ 1,335,597

Discontinued operations (Tables

Discontinued operations (Tables)	12 Months Ended
	Dec. 31, 2020
Discontinued operations.
Schedule of financial information for Mexico project development	Summarized financial information for the Mexico project development is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Cash ​ $ 154,130 ​ $ 831,586 Prepaid expenses and other current assets ​ ​ 88,978 ​ ​ 111,220 Value added taxes receivable ​ ​ 1,267,991 ​ ​ 676,250 Property, plant and equipment, net ​ 5,682 ​ 10,227 Land and rights of way ​ 21,126,898 ​ 24,162,523 Other assets ​ 33,909 ​ 3,497,216 Total assets of discontinued operations ​ $ 22,677,588 ​ $ 29,289,022 ​ ​ ​ Total liabilities of discontinued operations ​ $ 190,933 ​ $ 2,858,314 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Revenues ​ $ — ​ $ — Income from operations ​ $ — ​ $ — Net loss from discontinued operations ​ $ 4,902,243 ​ $ 2,333,255 Gain on sale of discontinued operations ​ $ — ​ $ — Depreciation expense ​ $ 4,545 ​ $ 4,545

Intangible assets (Tables)

Intangible assets (Tables)	12 Months Ended
	Dec. 31, 2020
Intangible assets
Schedule of Finite-Lived Intangible Assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Cost ​ ​ Non-compete agreements ​ $ 530,000 ​ $ 530,000 Trade names ​ 2,700,000 ​ 2,700,000 Certifications/programs ​ 2,000,000 ​ 2,000,000 Customer backlogs ​ 460,000 ​ 460,000 Customer relationships ​ ​ 2,000,000 ​ ​ 2,000,000 Facility management contracts ​ 2,200,000 ​ 2,200,000 ​ ​ 9,890,000 ​ 9,890,000 Accumulated amortization ​ ​ ​ Non-compete agreements ​ (443,889) ​ (320,556) Trade names ​ (560,000) ​ (380,000) Certifications/programs ​ (2,000,000) ​ (2,000,000) Customer backlogs ​ (310,000) ​ (130,000) Customer relationships ​ ​ (2,000,000) ​ ​ (1,958,333) Facility management contracts ​ (427,778) ​ (61,111) ​ ​ (5,741,667) ​ (4,850,000) Intangible assets, net ​ $ 4,148,333 ​ $ 5,040,000
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Amortization of intangible assets for each of the next five years and thereafter is expected to be as follows: ​ ​ ​ ​ ​ 2021 $ 746,667 2022 ​ 582,778 2023 ​ 546,667 2024 ​ 546,667 2025 ​ 485,556 Thereafter ​ 1,239,998 ​ ​ $ 4,148,333 ​

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases
Schedule of lease-related assets and liabilities	The following table presents the lease-related assets and liabilities and their respective classification on the consolidated balance sheets: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2020 ​ 2019 ASSETS ​ ​ Current ​ ​ ​ Prepaid expenses and other current assets ​ $ 108,303 ​ $ 33,567 Current assets of discontinued operations ​ ​ — ​ ​ 2,530 Noncurrent ​ ​ ​ ​ Operating lease right-of-use assets ​ 1,329,561 ​ 1,811,516 Long-term assets of discontinued operations ​ ​ 33,909 ​ ​ 2,627,696 Total lease right-of-use assets ​ $ 1,471,773 ​ $ 4,475,309 ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ Current ​ ​ ​ Current maturities of operating leases ​ $ 455,788 ​ $ 688,540 Current liabilities of discontinued operations ​ ​ 29,432 ​ ​ 67,211 Noncurrent ​ ​ ​ ​ Noncurrent operating leases ​ ​ 982,076 ​ ​ 1,156,543 Noncurrent liabilities of discontinued operations ​ 2,499 ​ 2,679,932 Total lease liabilities ​ $ 1,469,795 ​ $ 4,592,226 ​ ​ ​ ​ ​ ​ ​ Weighted average remaining lease term: ​ ​ Operating leases ​ 3.4 years ​ 3.5 years Operating leases - discontinued operations ​ ​ 1.1 years ​ ​ 24.0 years ​ ​ ​ ​ Weighted average discount rate: ​ ​ ​ Operating leases ​ 4.15% ​ 4.37% Operating leases - discontinued operations ​ ​ 3.48% ​ ​ 4.68%
Schedule of Lease, Cost	​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2020 ​ 2019 ASSETS ​ ​ Current ​ ​ ​ Prepaid expenses and other current assets ​ $ 108,303 ​ $ 33,567 Current assets of discontinued operations ​ ​ — ​ ​ 2,530 Noncurrent ​ ​ ​ ​ Operating lease right-of-use assets ​ 1,329,561 ​ 1,811,516 Long-term assets of discontinued operations ​ ​ 33,909 ​ ​ 2,627,696 Total lease right-of-use assets ​ $ 1,471,773 ​ $ 4,475,309 ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ Current ​ ​ ​ Current maturities of operating leases ​ $ 455,788 ​ $ 688,540 Current liabilities of discontinued operations ​ ​ 29,432 ​ ​ 67,211 Noncurrent ​ ​ ​ ​ Noncurrent operating leases ​ ​ 982,076 ​ ​ 1,156,543 Noncurrent liabilities of discontinued operations ​ 2,499 ​ 2,679,932 Total lease liabilities ​ $ 1,469,795 ​ $ 4,592,226 ​ ​ ​ ​ ​ ​ ​ Weighted average remaining lease term: ​ ​ Operating leases ​ 3.4 years ​ 3.5 years Operating leases - discontinued operations ​ ​ 1.1 years ​ ​ 24.0 years ​ ​ ​ ​ Weighted average discount rate: ​ ​ ​ Operating leases ​ 4.15% ​ 4.37% Operating leases - discontinued operations ​ ​ 3.48% ​ ​ 4.68%
Schedule of Cash Flow, Supplemental	Supplemental cash flow information related to leases is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ ​ 2020 ​ 2019 ​ Cash paid for amounts included in measurement of liabilities: ​ ​ ​ ​ ​ Operating cash outflows for operating leases ​ $ 708,095 ​ $ 717,172 ​ Operating cash outflows for operating leases - discontinued operations ​ ​ 127,153 ​ ​ 250,833 ​
Schedule of future lease payments relating to the Company's operating lease liabilities	​ ​ ​ ​ ​ Years ending December 31, Total 2021 ​ $ 505,206 2022 ​ 402,563 2023 ​ 405,113 2024 ​ 186,670 2025 ​ ​ 43,229 Thereafter ​ — Total future lease payments ​ 1,542,781 Less: imputed interest ​ (104,917) Total lease obligations ​ 1,437,864 Less: current obligations ​ (455,788) Noncurrent lease obligations ​ $ 982,076

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income taxes
Schedule of components of income before income taxes	The components of income before income taxes for the years ended December 31, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Foreign (not subject to income taxes) ​ $ 6,475,693 ​ $ 13,593,497 Mexico ​ (4,903,988) ​ (2,458,210) United States ​ 2,956,552 ​ 2,657,405 ​ ​ 4,528,257 ​ 13,792,692 Less gain on sale of discontinued operations ​ ​ — ​ ​ (3,621,170) Less discontinued operations ​ 4,902,243 ​ 2,333,255 ​ ​ $ 9,430,500 ​ $ 12,504,777 ​
Schedule of provision for income taxes deferred tax benefit relating to U.S. operations	The Company’s provision for income taxes for the years ended December 31, 2020 and 2019, which related to U.S. operations, consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Current: ​ ​ ​ ​ ​ ​ Federal ​ $ 191,322 ​ $ 143,567 State ​ ​ 87,630 ​ ​ 171,093 Foreign ​ ​ — ​ ​ — Total ​ ​ 278,952 ​ ​ 314,660 Deferred: ​ ​ ​ ​ Federal ​ ​ (132,957) ​ ​ (203,031) State ​ ​ (59,271) ​ ​ (45,008) Foreign ​ ​ — ​ ​ — Total ​ ​ (192,228) ​ ​ (248,039) Total provision ​ $ 86,724 ​ $ 66,621 ​
Schedule of reconciliation of federal tax rate to the effective rate	A reconciliation of the U.S. statutory federal tax rate to the effective rate for the years ended December 31, 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 U.S. statutory federal rate ​ 21.00 % 21.00 % State taxes, net of federal effect 4.00 % 4.38 % Nontaxable foreign income (17.28) % (19.98) % Research & development tax credit (11.73) % (3.82) % Permanent items (0.67) % (0.87) % Valuation allowance for deferred tax assets 5.60 % (0.18) % ​ 0.92 % 0.53 % ​
Schedule of tax effects of significant items net long-term deferred tax assets liability	The tax effects of significant items comprising the Company’s net long-term deferred tax liability as of December 31, 2020 and 2019 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Continuing Operations ​ ​ ​ ​ ​ ​ Deferred tax assets: ​ ​ Research & development tax credits ​ $ 613,003 ​ $ 166,653 Accrued compensation ​ ​ 110,092 ​ ​ — Valuation allowances ​ (496,343) ​ (43,900) ​ ​ 226,752 ​ 122,753 Deferred tax liabilities: ​ ​ Property and equipment ​ 252,800 ​ 148,707 Intangible assets ​ 1,188,009 ​ 1,380,328 ​ ​ 1,440,809 ​ 1,529,035 ​ ​ ​ ​ ​ ​ ​ Net deferred tax liability ​ $ 1,214,057 ​ $ 1,406,282 ​ ​ ​ ​ ​ ​ ​ Discontinued Operations ​ ​ ​ ​ ​ ​ Deferred tax assets: ​ ​ ​ ​ ​ ​ Operating loss carryforwards - Mexico ​ $ 4,296,453 ​ $ 3,427,295 Land basis difference - Mexico ​ ​ 1,262,159 ​ ​ 1,164,365 Start-up costs - Mexico ​ ​ 4,904,337 ​ ​ 4,608,990 Valuation allowances ​ ​ (10,462,949) ​ ​ (9,200,650) ​ ​ $ — ​ $ —

Earnings per share (Tables)

Earnings per share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings per share
Schedule of computation of basic and diluted EPS	​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ $ 8,613,771 ​ $ 10,888,178 Less: preferred stock dividends ​ (11,740) ​ (11,937) Net income from continuing operations available to common shares in the determination of basic earnings per common share ​ 8,602,031 ​ 10,876,241 Total income (loss) from discontinued operations ​ (4,902,243) ​ 1,287,915 Net income available to common shares in the determination of basic earnings per common share ​ $ 3,699,788 ​ $ 12,164,156 ​ ​ ​ ​ ​ ​ ​ Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ 15,119,305 ​ 15,025,639 Plus: ​ ​ ​ ​ Weighted average number of preferred shares outstanding during the period ​ 33,814 ​ 33,983 Potential dilutive effect of unexercised options and unvested stock grants ​ 70,836 ​ 77,454 Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ 15,223,955 ​ 15,137,076

Dividends (Tables)

Dividends (Tables)	12 Months Ended
	Dec. 31, 2020
Dividends.
Schedule of dividends	​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 First Quarter ​ $ 0.085 ​ $ 0.085 Second Quarter ​ 0.085 ​ 0.085 Third Quarter ​ 0.085 ​ 0.085 Fourth Quarter ​ 0.085 ​ 0.085 ​ ​ $ 0.34 ​ $ 0.34

Segment information (Tables)

Segment information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment information
Schedule of segment reporting information, by segment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Retail Bulk Services Manufacturing Total Revenue ​ $ 22,952,370 ​ $ 24,312,546 ​ $ 12,937,859 ​ $ 12,425,351 $ 72,628,126 Cost of revenue ​ 11,080,814 ​ 16,959,563 ​ 9,698,214 ​ 8,121,080 ​ 45,859,671 Gross profit ​ 11,871,556 ​ 7,352,983 ​ 3,239,645 ​ 4,304,271 ​ 26,768,455 General and administrative expenses ​ 12,879,445 ​ 1,260,062 ​ 2,834,917 ​ 1,460,474 ​ 18,434,898 Gain on asset dispositions and impairments, net ​ 2,965 ​ 7,213 ​ 3,801 ​ 18 ​ 13,997 Income (loss) from operations ​ $ (1,004,924) ​ $ 6,100,134 ​ $ 408,529 ​ $ 2,843,815 ​ 8,347,554 Other income, net ​ ​ ​ ​ ​ ​ ​ 1,082,946 Income before income taxes ​ ​ ​ ​ ​ 9,430,500 Provision for income taxes ​ ​ ​ ​ ​ 86,724 Net income from continuing operations ​ ​ ​ ​ ​ 9,343,776 Income from continuing operations attributable to non-controlling interests ​ ​ ​ ​ ​ 730,005 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ 8,613,771 Net loss from discontinued operations ​ ​ ​ ​ ​ (4,902,243) Net income attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ $ 3,711,528 ​ Depreciation and amortization expenses for the year ended December 31, 2020 for the retail, bulk, services and manufacturing segments were $2,388,781, $3,869,377, $762,182 and $386,169, respectively. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 ​ Retail Bulk Services Manufacturing Total Accounts receivable, net ​ $ 2,444,455 ​ $ 17,022,813 ​ $ 1,420,609 ​ $ 596,099 ​ $ 21,483,976 Inventory, current and non-current ​ $ 2,787,163 ​ $ 3,795,544 ​ $ — ​ $ 1,138,313 ​ $ 7,721,020 Property, plant and equipment, net ​ $ 27,947,545 ​ $ 27,611,567 ​ $ 487,973 ​ $ 1,640,899 ​ $ 57,687,984 Construction in progress ​ $ 305,110 ​ $ 31,737 ​ $ — ​ $ 103,537 ​ $ 440,384 Intangibles, net ​ $ — ​ $ — ​ $ 3,200,555 ​ $ 947,778 ​ $ 4,148,333 Goodwill ​ $ 1,170,511 ​ $ 1,948,875 ​ $ 5,320,416 ​ $ 4,885,211 ​ $ 13,325,013 Total segment assets ​ $ 56,425,159 ​ $ 74,771,798 ​ $ 14,470,322 ​ $ 11,210,685 ​ $ 156,877,964 Assets of discontinued operations ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 22,677,588 Total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 179,555,552 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2019 ​ Retail Bulk Services Manufacturing Total Revenue ​ $ 26,456,022 ​ $ 26,986,108 ​ $ 1,759,446 ​ $ 13,592,075 ​ $ 68,793,651 Cost of revenue ​ 11,611,165 ​ 18,606,805 ​ 1,215,193 ​ 9,086,140 ​ 40,519,303 Gross profit ​ 14,844,857 ​ 8,379,303 ​ 544,253 ​ 4,505,935 ​ 28,274,348 General and administrative expenses ​ 13,422,821 ​ 1,238,296 ​ 392,425 ​ 1,947,622 ​ 17,001,164 Gain on asset dispositions and impairments, net ​ 398,041 ​ 47,000 ​ — ​ — ​ 445,041 Income from operations ​ $ 1,820,077 ​ $ 7,188,007 ​ $ 151,828 ​ $ 2,558,313 ​ 11,718,225 Other income, net ​ ​ ​ ​ ​ 786,552 Income before income taxes ​ ​ ​ ​ ​ 12,504,777 Provision for income taxes ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 66,621 Net income from continuing operations ​ ​ ​ ​ ​ 12,438,156 Income from continuing operations attributable to non-controlling interests ​ ​ ​ ​ ​ 1,549,978 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ 10,888,178 Net income from discontinued operations ​ ​ ​ ​ ​ 1,287,915 Net income attributable to Consolidated Water Co. Ltd. stockholders ​ ​ ​ ​ ​ $ 12,176,093 ​ Depreciation and amortization expenses for the year ended December 31, 2019 for the retail, bulk, services and manufacturing segments were $2,364,994, $3,795,320, $120,761 and $922,027, respectively. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2019 ​ Retail Bulk Services Manufacturing Total Accounts receivable, net ​ $ 2,891,165 ​ $ 18,883,493 ​ $ 678,119 ​ $ 500,882 ​ $ 22,953,659 Inventory, current and non-current ​ $ 2,668,902 ​ $ 3,628,443 ​ $ — ​ $ 1,394,588 ​ $ 7,691,933 Property, plant and equipment, net ​ $ 29,177,718 ​ $ 30,281,647 ​ $ 158,358 ​ $ 1,621,029 ​ $ 61,238,752 Construction in progress ​ $ 396,214 ​ $ 869,792 ​ $ — ​ $ 69,591 ​ $ 1,335,597 Intangibles, net ​ $ — ​ $ — ​ $ 3,877,222 ​ $ 1,162,778 ​ $ 5,040,000 Goodwill ​ $ 1,170,511 ​ $ 1,948,875 ​ $ 5,320,416 ​ $ 4,885,211 ​ $ 13,325,013 Total segment assets ​ $ 65,554,640 ​ $ 69,423,770 ​ $ 12,895,385 ​ $ 14,854,557 ​ $ 162,728,352 Assets of discontinued operations ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 29,289,022 Total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 192,017,374
Schedule of revenues earned by major geographic region	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2020 2019 Cayman Islands ​ $ 25,640,169 ​ $ 30,327,139 Bahamas ​ 21,654,153 ​ 23,114,860 Indonesia ​ — ​ 131 United States ​ 24,918,527 ​ 14,968,868 Revenues earned from management services agreement with OC-BVI ​ 415,277 ​ 382,653 ​ ​ $ 72,628,126 ​ $ 68,793,651 ​ Revenues earned from major customers were: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2020 2019 Revenue earned from the Water and Sewerage Corporation ("WSC") ​ $ 21,527,487 ​ $ 22,877,741 Percentage of consolidated revenue earned from the WSC ​ 30% ​ 33% Revenue earned from one manufacturing segment customer ​ $ 9,965,041 ​ $ 9,238,476 Percentage of consolidated revenue earned from the one manufacturing segment customer ​ 14% ​ 13%
Schedule of long-lived assets by geographic areas	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 2019 Cayman Islands ​ $ 28,474,748 ​ $ 29,059,294 The Bahamas ​ 26,975,427 ​ 30,245,741 United States ​ 2,237,809 ​ 1,933,717 ​ ​ $ 57,687,984 ​ $ 61,238,752

Cost of revenues and general _2

Cost of revenues and general and administrative expenses (Tables)	12 Months Ended
	Dec. 31, 2020
Cost of revenues and general and administrative expenses
Schedule of cost of revenues and general and administrative expenses	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Cost of revenue consist of: ​ ​ ​ ​ ​ ​ Electricity ​ $ 5,389,361 ​ $ 7,438,218 Depreciation ​ 6,202,012 ​ 6,046,810 Fuel oil ​ 4,157,393 ​ 5,315,676 Employee costs ​ 11,308,833 ​ 6,597,755 Maintenance ​ 2,859,262 ​ 2,076,501 Retail license royalties ​ 1,489,862 ​ 1,701,724 Insurance ​ 1,491,799 ​ 1,279,997 Materials ​ 5,786,698 ​ 6,151,064 Other ​ 7,174,451 ​ 3,911,558 ​ ​ $ 45,859,671 ​ $ 40,519,303 ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ ​ 2020 ​ 2019 General and administrative expenses consist of: ​ ​ Employee costs ​ $ 10,025,658 ​ $ 9,335,247 Insurance ​ 1,436,957 ​ 866,457 Professional fees ​ 1,549,878 ​ 1,178,621 Directors’ fees and expenses ​ 865,555 ​ 969,279 Depreciation ​ 133,477 ​ 135,272 Amortization of intangible assets ​ 891,667 ​ 841,667 Other ​ 3,531,706 ​ 3,674,621 ​ ​ $ 18,434,898 ​ $ 17,001,164

Stock-based compensation (Table

Stock-based compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Stock-based compensation
Schedule of significant weighted average assumptions	​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 Risk free interest rate 0.17 % 2.11 % Expected option life (years) 1.1 1.1 ​ Expected volatility 51.19 % 34.59 % Expected dividend yield 2.42 % 2.44 %
Schedule of company's stock option activity	A summary of the Company’s stock option activity for the year ended December 31, 2020 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ ​ ​ Exercise ​ Contractual ​ Intrinsic ​ Options Price Life (Years) Value (1) Outstanding at beginning of period 10,650 ​ $ 13.08 ​ Granted 8,223 ​ 10.67 ​ Exercised (835) ​ 10.10 ​ Forfeited/expired (8,008) ​ 11.04 ​ Outstanding as of December 31, 2020 10,030 ​ $ 12.98 2.07 years $ — Exercisable as of December 31, 2020 — ​ $ — — years $ — (1) The intrinsic value of a stock option represents the amount by which the fair value of the underlying stock, measured by reference to the closing price of the common shares of $12.05 on the Nasdaq Global Select Market on December 31, 2020, exceeds the exercise price of the option.
Schedule of weighted average fair value of options at the date of grant and the intrinsic value	​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 Options granted with an exercise price below market price on the date of grant: ​ ​ Employees — preferred stock ​ $ 2.70 ​ $ 3.73 Overall weighted average ​ 2.70 ​ 3.73 ​ ​ ​ ​ ​ ​ ​ Options granted with an exercise price at market price on the date of grant: ​ ​ Management employees ​ $ — ​ $ — Employees — common stock ​ 2.45 ​ 3.23 Overall weighted average ​ 2.45 ​ 3.23 ​ ​ ​ ​ ​ ​ ​ Options granted with an exercise price above market price on the date of grant: ​ ​ Management employees ​ $ — ​ $ — Employees — preferred stock ​ — ​ — Overall weighted average ​ — ​ — ​ ​ ​ ​ ​ ​ ​ Total intrinsic value of options exercised ​ $ 3,891 ​ $ 5,857

Financial instruments (Tables)

Financial instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Financial instruments
Schedule of Fair value hierarchy for assets and liabilities	The following table presents the Company’s fair value hierarchy for assets and liabilities measured at fair value as of December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Level 1 Level 2 Level 3 Total Liabilities: ​ ​ ​ ​ ​ Recurring ​ ​ ​ ​ ​ Net liability arising from put/call options ​ $ — ​ $ — ​ $ 690,000 ​ $ 690,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Level 1 Level 2 Level 3 Total Liabilities: ​ ​ ​ ​ ​ Recurring ​ ​ ​ ​ ​ Net liability arising from put/call options ​ $ — ​ $ — ​ $ 664,000 ​ $ 664,000
Schedule of Net liability arising from put/call options	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Level 1 Level 2 Level 3 Total Liabilities: ​ ​ ​ ​ ​ Recurring ​ ​ ​ ​ ​ Net liability arising from put/call options ​ $ — ​ $ — ​ $ 664,000 ​ $ 664,000
Schedule of Net asset arising from put/call options	The activity for the Level 3 asset for the year ended December 31, 2020: ​ ​ ​ ​ ​ Net liability arising from put/call options ​ ​ Balance as of December 31, 2019 ​ $ 664,000 Unrealized loss ​ 26,000 Balance as of December 31, 2020 ​ $ 690,000

Acquisition of PERC (Tables)

Acquisition of PERC (Tables)	12 Months Ended
	Dec. 31, 2020
Acquisition of PERC
Summary of purchase price for PERC	​ ​ ​ ​ ​ Cash consideration ​ Purchase price (excluding working capital) ​ $ 4,088,817 Cash acquired ​ (941,379) Total cash consideration ​ $ 3,147,438
Summary of estimated fair values of the assets and liabilities assumed at the acquisition date	​ ​ ​ ​ ​ Financial assets $ 1,371,532 Contract assets ​ 20,854 Property, plant and equipment ​ 86,287 Identifiable intangible assets ​ 3,990,000 Deferred tax liability ​ ​ (1,117,200) Accounts payable and accrued liabilities ​ (1,260,722) Working capital adjustment payable ​ (23,467) Deferred revenue ​ (117,636) Contract liabilities ​ (760,992) Net liability arising from put/call options ​ (744,000) Total identifiable net assets ​ 1,444,656 Non-controlling interest in PERC ​ (3,617,634) Goodwill ​ 5,320,416 ​ ​ $ 3,147,438
Summary of components of identifiable intangible assets assumed at the acquisition date	​ ​ ​ ​ ​ ​ ​ ​ Amount Useful life Non-compete agreement ​ $ 130,000 3 years Trade name ​ 1,300,000 15 years Customer backlog ​ 360,000 2 years Facility management contracts ​ 2,200,000 6 years ​ ​ $ 3,990,000 ​ ​
Summary of results of operations of PERC included in the Company's results of operations	​ ​ ​ ​ ​ Revenue ​ $ 1,376,793 Gross profit ​ 407,604 Amortization of intangibles, net of tax benefit ​ (81,200) Net income ​ 37,924
Summary of pro forma financial information	​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2019 Revenue $ 77,615,958 Cost of revenue ​ 47,162,564 Gross profit ​ 30,453,394 General and administrative expenses ​ 21,620,106 Gain (loss) on asset dispositions and impairments, net ​ 447,681 Income from operations ​ 9,280,969 Other income (expense), net ​ 805,093 Income before income taxes ​ 10,086,062 Provision for (benefit from) income taxes ​ 72,814 Net income from continuing operations ​ 10,013,248 Income from continuing operations attributable to non-controlling interests ​ 1,505,068 Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders ​ 8,508,180 Gain on sale of discontinued operations ​ 3,621,170 Net income from discontinued operations ​ — Total income from discontinued operations ​ 3,621,170 Net income attributable to Consolidated Water Co. Ltd. stockholders ​ $ 12,129,350 ​ ​ ​ ​ Basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ Continuing operations ​ $ 0.57 Discontinued operations ​ 0.24 Basic earnings per share ​ $ 0.81 ​ ​ ​ ​ Diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders ​ Continuing operations ​ $ 0.56 Discontinued operations ​ 0.24 Diluted earnings per share ​ $ 0.80 ​ ​ ​ ​ Weighted average number of common shares used in the determination of: ​ Basic earnings per share ​ 15,025,639 Diluted earnings per share ​ 15,137,076

Supplemental disclosure of ca_2

Supplemental disclosure of cash flow information (Tables)	12 Months Ended
	Dec. 31, 2020
Supplemental disclosure of cash flow information
Schedule of Supplemental disclosure of cash flow information	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 2019 Interest paid in cash ​ $ 9,669 ​ $ 1,332 ​ ​ ​ ​ ​ ​ ​ Non-cash transactions: ​ ​ ​ Dividends declared but not paid ​ $ 1,289,854 ​ $ 1,282,086 Transfers from inventory to property, plant and equipment and construction in progress ​ $ 73,464 ​ $ 443,018 Transfers from construction in progress to property, plant and equipment ​ $ 1,653,501 ​ $ 7,755,375 Right-of-use assets obtained in exchange for new operating lease liabilities ​ $ 299,992 ​ $ 2,429,305 Purchase of equipment through issuance of long term debt ​ $ 122,292 ​ $ 78,899

Accounting policies - Basis of

Accounting policies - Basis of consolidation and Foreign currency (Details) - USD ($)	Aug. 11, 2020	Jan. 24, 2020	Dec. 31, 2020	Dec. 31, 2019
Foreign Currency Transaction Gain (Loss), before Tax [Abstract]
Foreign Currency Transaction Gain (Loss), before Tax			$ 68,818	$ 71,923
Aerex
Ownership interest acquired		49.00%
Ownership interest held		100.00%
Cash		$ 8,500,000
PERC Water Corporation
Ownership interest acquired	10.00%
Ownership interest held	61.00%
Cash	$ 900,000

Accounting policies - Cash and

Accounting policies - Cash and cash equivalents (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash Equivalents, at Carrying Value	$ 9,275,893	$ 13,362,649
Cash, Uninsured Amount	10,300,000
Cash And Restricted Cash Equivalents Held In Foreign Bank	32,800,000
Bahamas [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Deposits held in foreign bank	15,900,000
Certificates of Deposit [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash Equivalents, at Carrying Value	$ 8,500,000	$ 12,700,000

Accounting policies - Property,

Accounting policies - Property, plant and equipment (Details)	12 Months Ended
	Dec. 31, 2020
Building [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Plant And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Plant And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	4 years
Distribution Systems [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Distribution Systems [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Office furniture, fixtures and equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Office furniture, fixtures and equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Vehicles [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Vehicles [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Leasehold Improvements [Member]
Property, Plant and Equipment, Estimated Useful Lives	Shorter of 5 years or lease term
Lab equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Lab equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years

Accounting policies - Weighted

Accounting policies - Weighted the fair values estimated (Details)	Jan. 24, 2020USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2020USD ($)customer	Dec. 31, 2019USD ($)customer	Jan. 31, 2020	Dec. 31, 2018USD ($)	Feb. 11, 2016USD ($)
Goodwill				$ 13,325,013	$ 13,325,013
Retail [Member]
Estimated Fair Value Percentage Segment Reporting Information				100.00%	100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage				101	74
Goodwill				$ 1,170,511	$ 1,170,511
Bulk [Member]
Estimated Fair Value Percentage Segment Reporting Information				100.00%	100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage				49	58
Goodwill				$ 1,948,875	$ 1,948,875
Services [Member]
Estimated Fair Value Percentage Segment Reporting Information				100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage				17
Goodwill				$ 5,320,416	$ 5,320,416
Manufacturing Units [Member]
Estimated Fair Value Percentage Segment Reporting Information				100.00%	100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage				31
Goodwill				$ 4,885,211	$ 4,885,211
Discounted Cash Flow Method [Member] | Retail [Member]
Estimated Fair Value Percentage Segment Reporting Information				80.00%	80.00%
Discounted Cash Flow Method [Member] | Bulk [Member]
Estimated Fair Value Percentage Segment Reporting Information				80.00%	80.00%
Discounted Cash Flow Method [Member] | Services [Member]
Estimated Fair Value Percentage Segment Reporting Information				80.00%
Discounted Cash Flow Method [Member] | Manufacturing Units [Member]
Estimated Fair Value Percentage Segment Reporting Information				80.00%	80.00%
Guideline Public Company Method [Member] | Retail [Member]
Estimated Fair Value Percentage Segment Reporting Information				20.00%	10.00%
Guideline Public Company Method [Member] | Bulk [Member]
Estimated Fair Value Percentage Segment Reporting Information				20.00%	10.00%
Guideline Public Company Method [Member] | Services [Member]
Estimated Fair Value Percentage Segment Reporting Information				20.00%
Guideline Public Company Method [Member] | Manufacturing Units [Member]
Estimated Fair Value Percentage Segment Reporting Information				20.00%	10.00%
Mergers And Acquisitions Method [Member] | Retail [Member]
Estimated Fair Value Percentage Segment Reporting Information					10.00%
Mergers And Acquisitions Method [Member] | Bulk [Member]
Estimated Fair Value Percentage Segment Reporting Information					10.00%
Mergers And Acquisitions Method [Member] | Manufacturing Units [Member]
Estimated Fair Value Percentage Segment Reporting Information					10.00%
Aerex
Ownership interest acquired	49.00%					49.00%		51.00%
Amount of remaining ownership purchased	$ 8,500,000
Goodwill		$ 4,885,211	$ 6,285,211					$ 8,035,211
Impairment of goodwill		$ 1,400,000	$ 1,750,000
Number of customers | customer				1	1
Aerex | Revenue Benchmark [Member]
Percentage of total				80.00%	68.00%
Aerex | Gross Profit [Member]
Percentage of total				89.00%	68.00%
CW Belize [Member]
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent							$ 380,000

Accounting policies - Investmen

Accounting policies - Investments and Other assets (Details) gal in Millions	12 Months Ended
	Dec. 31, 2020USD ($)gal	Dec. 31, 2019USD ($)
Criteria for recognizing investment at cost	Investments where the Company does not exercise significant influence over the operating and financial policies of the investee and holds less than 20% of the voting stock are recorded at cost.
Equity Method Investment, Additional Information	The Company uses the equity method of accounting for investments in common stock where the Company holds 20% to 50% of the voting stock of the investee and has significant influence over its operating and financial policies but does not meet the criteria for consolidation.
Accumulated Amortization of Other Deferred Costs	$ 2,500,000	$ 2,400,000
Amortization of Other Deferred Charges	$ 179,353	179,353
Amount required to reduce the amount of water lost by the public water distribution system | gal	438
Capitalized Engineering Labor and Materials Cost [Member]
Other Assets	$ 3,500,000	$ 3,500,000

Accounting policies - Disaggreg

Accounting policies - Disaggregated revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Total Revenue	$ 72,628,126	$ 68,793,651
Contracts in progress
Number of days after consumption billings are considered past due	45 days
Bahamas [Member]
Total Revenue	$ 21,654,153	$ 23,114,860
Minimum [Member]
Contracts in progress
Number of days after consumption billings are collected	30 days
Maximum [Member]
Contracts in progress
Number of days after consumption billings are collected	35 days
Percentage Of Bad Debts	1.00%	1.00%
Retail revenue [Member]
Total Revenue	$ 22,952,370	$ 26,456,022
Bulk revenue [Member]
Total Revenue	24,312,546	26,986,108
Services revenue [Member]
Total Revenue	12,937,859	1,759,446
Manufacturing revenue [Member]
Total Revenue	$ 12,425,351	$ 13,592,075

Cash and cash equivalents (Deta

Cash and cash equivalents (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Bank accounts	$ 34,518,257	$ 28,708,434
Short term deposits	9,275,893	13,362,649
Cash and cash equivalents at end of period	43,794,150	42,071,083
United States dollar [Member]
Cash and Cash Equivalents [Line Items]
Bank accounts	14,001,264	15,661,140
Short term deposits	5,796,582	11,100,185
Cayman Islands dollar [Member]
Cash and Cash Equivalents [Line Items]
Bank accounts	5,650,874	6,690,274
Short term deposits	2,413,547	1,209,954
Bahamian dollar [Member]
Cash and Cash Equivalents [Line Items]
Bank accounts	14,863,287	6,353,936
Short term deposits	1,065,764	1,052,510
Bermudian dollar [Member]
Cash and Cash Equivalents [Line Items]
Bank accounts	$ 2,832	$ 3,084

Accounts receivable, net (Detai

Accounts receivable, net (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts receivable, net.
Trade accounts receivable	$ 21,422,782	$ 22,862,706
Receivable from OC-BVI	62,171	10,808
Other accounts receivable	269,133	222,381
Accounts Receivable, Gross, Current	21,754,086	23,095,895
Allowance for doubtful accounts	(270,110)	(142,236)	$ (158,902)
Accounts receivable, net	$ 21,483,976	$ 22,953,659

Accounts receivable, net - Allo

Accounts receivable, net - Allowance for doubtful accounts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accounts receivable, net.
Opening allowance for doubtful accounts	$ 142,236	$ 158,902
Provision for doubtful accounts	129,107	0
Accounts written off during the year	(1,233)	(16,666)
Ending allowance for doubtful accounts	$ 270,110	$ 142,236

Inventory (Details)

Inventory (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Inventory [Line Items]
Total inventory	$ 7,721,020	$ 7,691,933
Less current portion	3,214,178	3,287,555
Inventory (non-current)	4,506,842	4,404,378
Water stock [Member]
Inventory [Line Items]
Total inventory	27,938	33,694
Consumables stock [Member]
Inventory [Line Items]
Total inventory	105,540	118,286
Spare parts stock [Member]
Inventory [Line Items]
Total inventory	$ 7,587,542	$ 7,539,953

Contracts in progress (Details)

Contracts in progress (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Contracts in progress
Revenues recognized to date on contracts in process	$ 17,534,449	$ 16,054,699
Amounts billed to date on contracts in process	(17,791,928)	(15,078,830)
Retainage	312,130	361,556
Net contract asset	54,651	1,337,425
Contract assets	516,521	1,677,041
Contract liabilities	$ (461,870)	$ (339,616)

Contracts in progress - Narrati

Contracts in progress - Narratives (Details) $ in Millions	Dec. 31, 2020USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 0.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

Property, plant and equipment_3

Property, plant and equipment and construction in progress (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 135,066,814	$ 133,029,585
Less accumulated depreciation	77,378,830	71,790,833
Property, Plant and Equipment, Net, Total	57,687,984	61,238,752
Construction in progress	440,384	1,335,597
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,566,537	3,566,537
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	23,250,843	23,176,106
Plant And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	63,734,860	64,840,636
Distribution Systems [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	39,149,063	36,538,614
Office furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,079,362	3,038,589
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,999,463	1,582,053
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	274,230	272,092
Lab equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 12,456	$ 14,958

Property, plant and equipment_4

Property, plant and equipment and construction in progress - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, plant and equipment and construction in progress
Capital Commitments	$ 29,145
Construction In Progress Placed In Service	1,653,501	$ 7,755,375
Depreciation	$ 6,335,489	$ 5,510,336

Discontinued operations - Mexic

Discontinued operations - Mexico project development- Narratives (Details) $ / shares in Units, gal in Millions

Aug. 28, 2020USD ($)

Aug. 28, 2020MXN ($)

Jun. 29, 2020

Aug. 22, 2016gal

Feb. 28, 2018

Nov. 30, 2015gal

Feb. 28, 2014USD ($)

May 31, 2013USD ($)$ / shares

Feb. 29, 2012USD ($)

May 31, 2010gal

Jun. 30, 2020USD ($)

Jun. 30, 2020USD ($)

Dec. 31, 2015gal

Dec. 31, 2020USD ($)ha

Dec. 31, 2018

Jan. 31, 2018

Schedule of Investments [Line Items]

Period Required To Operate And Maintain Plant And Aqueduct

37 years

Subscription Agreement Description

The Agreement calls for NSC to retain a minimum of 25% of the equity in AdR. One or more affiliates of Greenfield SPV VII, S.A.P.I. de C.V. (“Greenfield”), a Mexico company managed by an affiliate of a leading U.S. asset manager, would acquire a minimum of 55% of the equity of AdR. The Agreement also provided Suez MA with the option to purchase 20% of the equity of AdR. If Suez MA did not exercise this option, NSC would retain 35% of the equity of AdR and Greenfield will acquire 65% of the equity of AdR. The Agreement became effective when the certain conditions precedent related to the Project were met. The aggregate investment to be made by the equity partners in the Project, in the form of equity and subordinated shareholder loans, is presently estimated at approximately 20% of the total cost of Phase 1 of the Project.

Number of days to submit list of non-recoverable expenses made

20 days

Impairment loss on long-lived assets

$ (3,000,000)

Adjustment to reduce operating lease right of use assets

2,600,000

$ 2,600,000

Adjustment to reduce operating lease liabilities

$ 2,200,000

2,200,000

Payments For Option Exercised

$ 1,000,000

Share Price | $ / shares

$ 1

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

50.00%

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

Land

$ 21,100,000

Equity Method Investment, Ownership Percentage

50.00%

Period in which construction must be completed

36 months

Payments for land and rights of way held for development

$ 3,000,000

Amount of non-recoverable expenses

$ 51,144,525

$ 137,333,114

Payments For Option Exercised

$ 1,000,000

Percentage of Voting Interest Acquired through Option Agreement

25.00%

25.00%

NSC Agua [Member] | Aguas de Rosarito S.A.P.I. de C.V [Member]

Schedule of Investments [Line Items]

Equity Method Investment, Ownership Percentage

0.40%

99.60%

NSC Agua [Member] | First Phase [Member]

Schedule of Investments [Line Items]

Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal

50

50

50

NSC Agua [Member] | Second Phase [Member]

Schedule of Investments [Line Items]

Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity | gal

50

50

50

NSC Agua [Member] | Option agreement [Member]

Schedule of Investments [Line Items]

Total Voting Interest Percentage After Conversion Of Loan

99.99%

99.99%

Repayment of inter-company loan payable

$ 5,700,000

Option Agreement Expiration Date

Feb. 7, 2014

Discontinued operations - Mex_2

Discontinued operations - Mexico project development (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total assets of discontinued operations	$ 22,677,588	$ 29,289,022
Discontinued Operations | Mexico Project Development
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	154,130	831,586
Prepaid expenses and other current assets	88,978	111,220
Value added taxes receivable	1,267,991	676,250
Property, plant and equipment, net	5,682	10,227
Land and rights of way	21,126,898	24,162,523
Other assets	33,909	3,497,216
Total assets of discontinued operations	22,677,588	29,289,022
Total liabilities of discontinued operations	$ 190,933	$ 2,858,314

Discontinued operations - Finan

Discontinued operations - Financial Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations		$ 2,333,255
Discontinued Operations | Mexico Project Development
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations	$ 4,902,243	2,333,255
Depreciation expense	$ 4,545	$ 4,545

Discontinued operations - CW-Be

Discontinued operations - CW-Belize - Additional Information (Details) - USD ($)	1 Months Ended		12 Months Ended
	Aug. 31, 2019	Feb. 14, 2019	Dec. 31, 2020	Dec. 31, 2019
Gain on sale of discontinued operations			$ 0	$ 3,621,170
CW Belize [Member]
Disposal Group, Including Discontinued Operation, Consideration		$ 7,000,000
Proceeds from Divestiture of Businesses	$ 265,000	6,735,000
Supplemental Deferred Purchase Price		$ 265,000
Gain on sale of discontinued operations				$ 3,621,170

Discontinued operations - CW-Ba

Discontinued operations - CW-Bali - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2019
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ (4,902,243)	$ 1,287,915
Consolidated Water Bali [Member]
Sale of assets			$ 365,000
Sale of stock			$ 25,000

Intangible assets - Costs and a

Intangible assets - Costs and accumulated amortization (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Cost
Finite-Lived Intangible Assets, Gross	$ 9,890,000	$ 9,890,000
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization	(5,741,667)	(4,850,000)
Intangible assets, net	4,148,333	5,040,000
Non-compete agreements
Cost
Finite-Lived Intangible Assets, Gross	530,000	530,000
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization	(443,889)	(320,556)
Trade names
Cost
Finite-Lived Intangible Assets, Gross	2,700,000	2,700,000
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization	(560,000)	(380,000)
Certifications/programs
Cost
Finite-Lived Intangible Assets, Gross	2,000,000	2,000,000
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization	(2,000,000)	(2,000,000)
Customer backlogs
Cost
Finite-Lived Intangible Assets, Gross	460,000	460,000
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization	(310,000)	(130,000)
Customer relationships
Cost
Finite-Lived Intangible Assets, Gross	2,000,000	2,000,000
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization	(2,000,000)	(1,958,333)
Facility management contracts
Cost
Finite-Lived Intangible Assets, Gross	2,200,000	2,200,000
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization	$ (427,778)	$ (61,111)

Intangible assets - Amortizatio

Intangible assets - Amortization of intangible assets (Details)	Dec. 31, 2020USD ($)
Intangible assets
2021	$ 746,667
2022	582,778
2023	546,667
2024	546,667
2025	485,556
Thereafter	1,239,998
Finite Lived Intangible Assets Net	$ 4,148,333

Intangible assets (Details)

Intangible assets (Details) - USD ($)	Oct. 24, 2019	Feb. 11, 2016	Oct. 31, 2019	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Aug. 31, 2020	Jan. 31, 2020	Jan. 24, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets					$ 891,667	$ 841,667
Aerex
Finite-Lived Intangible Assets [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		51.00%						49.00%	49.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 5,900,000
Aerex | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years
Aerex | Certification Marks [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years
Aerex | Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		1 year
Aerex | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		4 years
PERC Water Corporation
Finite-Lived Intangible Assets [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	51.00%		51.00%				61.00%
Amortization of Intangible Assets				$ (81,200)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			$ 3,990,000
Percentage of additional voting equity							10.00%
PERC Water Corporation | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years		3 years
PERC Water Corporation | Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			2 years
PERC Water Corporation | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			6 years
Trade name | Aerex
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Trade name | PERC Water Corporation
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			15 years

Leases - Lease assets and liabi

Leases - Lease assets and liabilities (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current
Prepaid expenses and other current assets	$ 108,303	$ 33,567
Current assets of discontinued operations		2,530
Noncurrent
Operating lease right-of-use assets	1,329,561	1,811,516
Long-term assets of discontinued operations	33,909	2,627,696
Total lease right-of-use assets	1,471,773	4,475,309
Current
Current maturities of operating leases	455,788	688,540
Current liabilities of discontinued operations	29,432	67,211
Noncurrent
Noncurrent operating leases	982,076	1,156,543
Noncurrent liabilities of discontinued operations	2,499	2,679,932
Total lease obligations	$ 1,469,795	$ 4,592,226
Operating leases, weighted average remaining lease term	3 years 4 months 24 days	3 years 6 months
Operating leases, weighted average discount rate	4.15%	4.37%
Discontinued Operations
Noncurrent
Operating leases, weighted average remaining lease term	1 year 1 month 6 days	24 years
Operating leases, weighted average discount rate	3.48%	4.68%

Leases - Components of lease co

Leases - Components of lease cost (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases
Operating lease costs	$ 773,756	$ 563,358
Short-term lease costs	5,518	16,469
Lease costs - discontinued operations	127,983	234,045
Total lease costs	$ 907,257	$ 813,872

Leases - Supplemental cash flow

Leases - Supplemental cash flow information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases
Operating cash outflows for operating leases	$ 708,095	$ 717,172
Operating cash flows from operating leases - discontinued operations	$ 127,153	$ 250,833

Leases - Future lease payments

Leases - Future lease payments (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Leases
2021	$ 505,206
2022	402,563
2023	405,113
2024	186,670
2025	43,229
Total future lease payments	1,542,781
Less: imputed interest	(104,917)
Total lease obligations	1,437,864
Less: current obligations	(455,788)	$ (688,540)
Noncurrent lease obligations	$ 982,076	$ 1,156,543

Leases - Additional Information

Leases - Additional Information (Details)	Dec. 31, 2020
Aguas de Rosarito S.A.P.I. de C.V [Member]
Lessee, Operating Lease, Renewal Term	20 years

Income taxes - Components of in

Income taxes - Components of income before income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income taxes
Foreign (not subject to income taxes)	$ 6,475,693	$ 13,593,497
Mexico	(4,903,988)	(2,458,210)
United States	2,956,552	2,657,405
Income before income taxes	4,528,257	13,792,692
Less gain on sale of discontinued operations	0	(3,621,170)
Less discontinued operations		2,333,255
Income before income taxes	$ 9,430,500	$ 12,504,777

Income taxes - Provision for in

Income taxes - Provision for income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 191,322	$ 143,567
State	87,630	171,093
Total	278,952	314,660
Deferred:
Federal	(132,957)	(203,031)
State	(59,271)	(45,008)
Total	(192,228)	(248,039)
Total provision	$ 86,724	$ 66,621

Income taxes - Reconciliation o

Income taxes - Reconciliation of federal tax rate to the effective rate (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income taxes
U.S. statutory federal rate	21.00%	21.00%
State taxes, net of federal effect	4.00%	4.38%
Nontaxable foreign income	(17.28%)	(19.98%)
Research & Development Tax Credit	(11.73%)	(3.82%)
Permanent items	(0.67%)	(0.87%)
Valuation allowance for deferred tax assets	5.60%	(0.18%)
Effective Income Tax Rate Reconciliation, Percent	0.92%	0.53%

Income taxes - Net long-term de

Income taxes - Net long-term deferred tax liability (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Research & development tax credits	$ 613,003	$ 166,653
Accrued compensation	110,092	0
Valuation allowances	(496,343)	(43,900)
Deferred Tax Assets, Net of Valuation Allowance	226,752	122,753
Deferred tax liabilities:
Property and equipment	252,800	148,707
Intangible assets	1,188,009	1,380,328
Deferred Tax Liabilities, Gross	1,440,809	1,529,035
Net deferred tax liability	1,214,057	1,406,282
Discontinued Operations
Deferred tax assets:
Operating loss carryforwards - Mexico	4,296,453	3,427,295
Land basis difference - Mexico	1,262,159	1,164,365
Start-up costs - Mexico	4,904,337	4,608,990
Valuation allowances	(10,462,949)	(9,200,650)
Deferred Tax Assets, Net of Valuation Allowance	$ 0	$ 0

Earnings per share (Details)

Earnings per share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings per share
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	$ 8,613,771	$ 10,888,178
Less: preferred stock dividends	(11,740)	(11,937)
Net income from continuing operations available to common shares in the determination of basic earnings per common share	8,602,031	10,876,241
Total income (loss) from discontinued operations	(4,902,243)	1,287,915
Net income available to common shares in the determination of basic earnings per common share	$ 3,699,788	$ 12,164,156
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares)	15,119,305	15,025,639
Weighted average number of preferred shares outstanding during the period (in shares)	33,814	33,983
Potential dilutive effect of unexercised options and unvested stock grants	70,836	77,454
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders	15,223,955	15,137,076

Dividends (Details)

Dividends (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Dividends.
Dividends Per Share Declared	$ 0.085	$ 0.085	$ 0.085	$ 0.085	$ 0.085	$ 0.085	$ 0.085	$ 0.085	$ 0.34	$ 0.34

Segment information (Details)

Segment information (Details)	12 Months Ended
	Dec. 31, 2020USD ($)segment	Dec. 31, 2019USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment	4
Revenue	$ 72,628,126	$ 68,793,651
Cost of revenue	45,859,671	40,519,303
Gross profit	26,768,455	28,274,348
General and administrative expenses	18,434,898	17,001,164
Gain on asset dispositions and impairments, net	13,997	445,041
Income from operations	8,347,554	11,718,225
Other expense, net	1,082,946	786,552
Income before income taxes	9,430,500	12,504,777
Benefit for income taxes	86,724	66,621
Net income from continuing operations	9,343,776	12,438,156
Income from continuing operations attributable to non-controlling interests	730,005	1,549,978
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	8,613,771	10,888,178
Net income from discontinued operations	(4,902,243)	1,287,915
Net income attributable to Consolidated Water Co. Ltd. stockholders	3,711,528	12,176,093
Accounts receivable, net	21,483,976	22,953,659
Inventory, current and non-current	7,721,020	7,691,933
Property, plant and equipment, net	57,687,984	61,238,752
Construction in progress	440,384	1,335,597
Intangibles, net	4,148,333	5,040,000
Goodwill	13,325,013	13,325,013
Total segment assets	156,877,964	162,728,352
Assets of discontinued operations	22,677,588	29,289,022
Total assets	179,555,552	192,017,374
Retail [Member]
Segment Reporting Information [Line Items]
Revenue	22,952,370	26,456,022
Cost of revenue	11,080,814	11,611,165
Gross profit	11,871,556	14,844,857
General and administrative expenses	12,879,445	13,422,821
Gain on asset dispositions and impairments, net	2,965	398,041
Income from operations	(1,004,924)	1,820,077
Accounts receivable, net	2,444,455	2,891,165
Inventory, current and non-current	2,787,163	2,668,902
Property, plant and equipment, net	27,947,545	29,177,718
Construction in progress	305,110	396,214
Goodwill	1,170,511	1,170,511
Total segment assets	56,425,159	65,554,640
Bulk [Member]
Segment Reporting Information [Line Items]
Revenue	24,312,546	26,986,108
Cost of revenue	16,959,563	18,606,805
Gross profit	7,352,983	8,379,303
General and administrative expenses	1,260,062	1,238,296
Gain on asset dispositions and impairments, net	7,213	47,000
Income from operations	6,100,134	7,188,007
Accounts receivable, net	17,022,813	18,883,493
Inventory, current and non-current	3,795,544	3,628,443
Property, plant and equipment, net	27,611,567	30,281,647
Construction in progress	31,737	869,792
Goodwill	1,948,875	1,948,875
Total segment assets	74,771,798	69,423,770
Services [Member]
Segment Reporting Information [Line Items]
Revenue	12,937,859	1,759,446
Cost of revenue	9,698,214	1,215,193
Gross profit	3,239,645	544,253
General and administrative expenses	2,834,917	392,425
Gain on asset dispositions and impairments, net	3,801
Income from operations	408,529	151,828
Accounts receivable, net	1,420,609	678,119
Property, plant and equipment, net	487,973	158,358
Intangibles, net	3,200,555	3,877,222
Goodwill	5,320,416	5,320,416
Total segment assets	14,470,322	12,895,385
Manufacturing Units [Member]
Segment Reporting Information [Line Items]
Revenue	12,425,351	13,592,075
Cost of revenue	8,121,080	9,086,140
Gross profit	4,304,271	4,505,935
General and administrative expenses	1,460,474	1,947,622
Gain on asset dispositions and impairments, net	18
Income from operations	2,843,815	2,558,313
Accounts receivable, net	596,099	500,882
Inventory, current and non-current	1,138,313	1,394,588
Property, plant and equipment, net	1,640,899	1,621,029
Construction in progress	103,537	69,591
Intangibles, net	947,778	1,162,778
Goodwill	4,885,211	4,885,211
Total segment assets	$ 11,210,685	$ 14,854,557

Segment information - Revenues

Segment information - Revenues earned by major geographic region and major customer (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 72,628,126	$ 68,793,651
Cayman Island [Member]
Segment Reporting Information [Line Items]
Revenue	25,640,169	30,327,139
Bahamas [Member]
Segment Reporting Information [Line Items]
Revenue	21,654,153	23,114,860
Indonesia [Member]
Segment Reporting Information [Line Items]
Revenue		131
United States [Member]
Segment Reporting Information [Line Items]
Revenue	24,918,527	14,968,868
Revenues earned from management services agreement with OC-BVI [Member]
Segment Reporting Information [Line Items]
Revenue	415,277	382,653
Water and Sewerage Corporation [Member]
Segment Reporting Information [Line Items]
Revenue	$ 21,527,487	$ 22,877,741
Percentage of consolidated revenues	30.00%	33.00%
One Customer [Member]
Segment Reporting Information [Line Items]
Revenue	$ 9,965,041	$ 9,238,476
Percentage of consolidated revenues	14.00%	13.00%

Segment information - Property,

Segment information - Property, plant and equipment, net by major geographic region (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Net	$ 57,687,984	$ 61,238,752
Cayman Island [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Net	28,474,748	29,059,294
Bahamas [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Net	26,975,427	30,245,741
United States [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Net	$ 2,237,809	$ 1,933,717

Segment information - Additiona

Segment information - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Retail [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	$ 2,388,781	$ 2,364,994
Bulk [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	3,869,377	3,795,320
Services [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	762,182	120,761
Manufacturing Units [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	$ 386,169	$ 922,027

Cost of revenues and general _3

Cost of revenues and general and administrative expenses - Cost of revenues (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	$ 45,859,671	$ 40,519,303
Electricity [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	5,389,361	7,438,218
Depreciation [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	6,202,012	6,046,810
Fuel oil [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	4,157,393	5,315,676
Employee costs [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	11,308,833	6,597,755
Maintenance [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	2,859,262	2,076,501
Retail license royalties [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	1,489,862	1,701,724
Insurance [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	1,491,799	1,279,997
Materials [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	5,786,698	6,151,064
Other [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost of Revenue	$ 7,174,451	$ 3,911,558

Cost of revenues and general _4

Cost of revenues and general and administrative expenses - General and administrative expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	$ 18,434,898	$ 17,001,164
Employee costs [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	10,025,658	9,335,247
Insurance [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	1,436,957	866,457
Professional fees [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	1,549,878	1,178,621
Directors' fees and expenses [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	865,555	969,279
Depreciation [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	133,477	135,272
Amortization of intangible assets [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	891,667	841,667
Other [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	$ 3,531,706	$ 3,674,621

Stock-based compensation - Sign

Stock-based compensation - Significant weighted average assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Stock-based compensation
Risk free interest rate	0.17%	2.11%
Expected option life (years)	1 year 1 month 6 days	1 year 1 month 6 days
Expected volatility	51.19%	34.59%
Expected dividend yield	2.42%	2.44%

Stock-based compensation - Stoc

Stock-based compensation - Stock option activity (Details)	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at the beginning of period -Options | shares	10,650
Granted - Options | shares	8,223
Exercised - Options | shares	(835)
Forfeited/expired - Options | shares	(8,008)
Outstanding at the ending of period -Options | shares	10,030
Outstanding-Weighted Average Exercise Price at the beginning of period - Options | $ / shares	$ 13.08
Granted-Weighted Average Exercise Price | $ / shares	10.67
Exercised-Weighted Average Exercise Price | $ / shares	10.10
Forfeited/expired-Weighted Average Exercise Price | $ / shares	11.04
Outstanding-Weighted Average Exercise Price at the ending of period - Options | $ / shares	$ 12.98
Outstanding-Weighted Average Remaining Contractual Life (Years)	2 years 25 days

Stock-based compensation - Weig

Stock-based compensation - Weighted average fair value of options at the date of grant and the intrinsic value of options exercised (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 3,891	$ 5,857
Below Market Price [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 2.70	$ 3.73
Below Market Price [Member] | Employees [Member] | Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	2.70	3.73
At Market Price [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	2.45	3.23
At Market Price [Member] | Management Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	0	0
At Market Price [Member] | Employees [Member] | Common stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	2.45	3.23
Above Market Price [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	0	0
Above Market Price [Member] | Management Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	0	0
Above Market Price [Member] | Employees [Member] | Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0	$ 0

Stock-based compensation (Detai

Stock-based compensation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	May 14, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative financial performance targets measurement period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	8,223
Allocated Share-based Compensation Expense, Net of Tax	$ 125,487	$ 142,632
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares	10,030
Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price	$ 12.98
Share Based Compensation Arrangement By Share Based Payment Award Options Non Vested Outstanding Weighted Average Remaining Contractual Term	2 years 25 days
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years 25 days
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 14,427
Preferred stock value	$ 18,641	20,251
Number of days employee option to purchase preferred stock must be exercised	30 days
Share-based Compensation	$ 1,163,261	$ 1,192,224
Closing Price of Common Shares	$ 12.05
Non Executive Directors Share Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	19,712	22,034
Share-based Compensation	$ 318,991	$ 322,036
Non-Performance-Based Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Cumulative financial performance targets measurement period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	25,789	28,891
Allocated Share-based Compensation Expense	$ 344,940	$ 337,032
Performance-Based Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative financial performance targets measurement period	3 years	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	31,788	36,007
Allocated Share-based Compensation Expense	$ 373,843	$ 390,524
Employee Stock Option [Member] | Common Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	2,100	2,575
Equity Incentive Plan2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance			1,500,000
Redeemable preferred stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Non Vested Outstanding Weighted Average Remaining Contractual Term	1 year 1 month 24 days
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 142,328
Preferred stock value	$ 0
Additional consecutive individual requisite service period required for eligibility in Employee Share Incentive Plan	4 years
Number of preferred shares converted to common shares dependent upon specific criteria	1
Number of common shares received upon conversion of preferred shares dependent upon specific criteria	1
Number of average trading price of the common stock	7 days
Stock Issued During Period, Shares, Issued for Services	6,123	7,293

Retirement benefits (Details)

Retirement benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	$ 576,096	$ 450,732
Cayman Island [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	5.00%
Maximum annual contribution amount	$ 104,400
Florida
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	6.00%
California [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer Matching Contribution, Percent of Employees' Gross Pay	2.00%
California [Member] | Defined Contribution Plan, Employer Matching Contribution, 25 Percent of Match [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer Matching Contribution, Percent of Match	25.00%
California [Member] | Defined Contribution Plan, Employer Matching Contribution, 25 Percent of Match [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer Matching Contribution, Percent of Match	10.00%

Financial instruments (Details)

Financial instruments (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Recurring
Net liability arising from put/call options	$ 690,000	$ 664,000
Fair Value, Inputs, Level 3 [Member]
Recurring
Net liability arising from put/call options	$ 690,000	$ 664,000

Financial instruments - Level 3

Financial instruments - Level 3 activity (Details)	12 Months Ended
	Dec. 31, 2020USD ($)
Net liability arising from put/call options
Balance as of December 31, 2019	$ 664,000
Unrealized loss	(26,000)
Balance as of December 31, 2020	$ 690,000

Financial instruments - Additio

Financial instruments - Additional Information (Details)	12 Months Ended
	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of days after consumption billings are considered past due	45 days
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Duration certain foreign currencies are fixed to the dollar	20 years

Commitments and contingencies -

Commitments and contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)item	Dec. 31, 2019USD ($)
Contingencies
Employment Agreement Base Annual Salaries	$ 4.7
Number of reporting units | item	4
Cayman Water Retail Operations, Percentage Of Revenue	32.00%	38.00%
Cayman Water Retail Operations, Percentage Of Gross Profit	44.00%	53.00%
Long-term Purchase Commitment, Amount	$ 1.8
WSC [Member]
Contingencies
Accounts Receivable, Net	$ 16.8	$ 18.4

Acquisition of PERC - Purchase

Acquisition of PERC - Purchase agreement and summary of purchase price (Details) - USD ($)	Aug. 11, 2020	Oct. 24, 2019	Aug. 31, 2020	Dec. 31, 2020	Oct. 31, 2019
Cash consideration
Discount for marketability of noncontrolling interest				8.40%
PERC Water Corporation
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	10.00%
Noncontrolling Interest, Ownership Percentage by Parent	61.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			39.00%
Cash consideration
Total cash consideration	$ 900,000
PERC Water Corporation
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		51.00%	61.00%		51.00%
Percentage of additional voting equity			10.00%
Cash consideration
Purchase price (excluding working capital)		$ 4,088,817
Cash acquired		(941,379)
Total cash consideration		$ 3,147,438	$ 900,000
PERC Water Corporation | Consolidated Water U S Holdings [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		51.00%
PERC Water Corporation | Three Executives [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		49.00%

Acquisition of PERC - Estimated

Acquisition of PERC - Estimated fair values of the assets and liabilities assumed at the acquisition date (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Oct. 24, 2019
Business Acquisition [Line Items]
Goodwill	$ 13,325,013	$ 13,325,013
PERC Water Corporation
Business Acquisition [Line Items]
Financial assets			$ 1,371,532
Costs and estimated earnings in excess of billings			20,854
Property, plant and equipment			86,287
Identifiable intangible assets			3,990,000
Deferred tax liability			(1,117,200)
Accounts payable and accrued liabilities			(1,260,722)
Working capital adjustment payable			(23,467)
Deferred revenue			(117,636)
Billings in excess of costs and estimated earnings			(760,992)
Net liability arising from put/call options			(744,000)
Total identifiable net assets			1,444,656
Non-controlling interest in PERC			(3,617,634)
Goodwill			5,320,416
Total cash consideration			$ 3,147,438

Acquisition of PERC - Component

Acquisition of PERC - Components of identifiable intangible assets assumed at the acquisition date (Details) - PERC Water Corporation - USD ($)	Oct. 24, 2019	Oct. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 3,990,000
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 130,000
Useful life	3 years	3 years
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 1,300,000
Useful life	15 years
Customer backlogs
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 360,000
Useful life	2 years
Facility management contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 2,200,000
Useful life	6 years

Acquisition of PERC - Results o

Acquisition of PERC - Results of operations of PERC included in the Company's results of operations (Details) - USD ($)	2 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Revenue		$ 72,628,126	$ 68,793,651
Gross profit		26,768,455	28,274,348
Amortization of intangibles, net of tax benefit		891,667	841,667
Net income		$ 3,711,528	$ 12,176,093
PERC Water Corporation
Business Acquisition [Line Items]
Revenue	$ 1,376,793
Gross profit	407,604
Amortization of intangibles, net of tax benefit	(81,200)
Net income	$ 37,924

Acquisition of PERC - Financial

Acquisition of PERC - Financial Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 72,628,126	$ 68,793,651
Cost of revenue	45,859,671	40,519,303
Gross profit	26,768,455	28,274,348
General and administrative expenses	18,434,898	17,001,164
Gain (loss) on asset dispositions and impairments, net	13,997	445,041
Income from operations	8,347,554	11,718,225
Other income (expense):
Other expense, net	1,082,946	786,552
Income before income taxes	9,430,500	12,504,777
Provision for income taxes	86,724	66,621
Net income from continuing operations	9,343,776	12,438,156
Income from continuing operations attributable to non-controlling interests	730,005	1,549,978
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	8,613,771	10,888,178
Gain on sale of discontinued operations	0	3,621,170
Less discontinued operations		2,333,255
Total income (loss) from discontinued operations	(4,902,243)	1,287,915
Net income attributable to Consolidated Water Co. Ltd. stockholders	$ 3,711,528	$ 12,176,093
Basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders
Continuing operations	$ 0.56	$ 0.72
Discontinued operations	(0.32)	0.09
Basic earnings per share	0.24	0.81
Diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders
Continuing operations	0.56	0.72
Discontinued operations	(0.32)	0.08
Diluted earnings per share	$ 0.24	$ 0.80
Weighted average number of common shares used in the determination of:
Basic earnings per share	15,119,305	15,025,639
Diluted earnings per share	15,223,955	15,137,076
Pro Forma
Revenue		$ 77,615,958
Cost of revenue		47,162,564
Gross profit		30,453,394
General and administrative expenses		21,620,106
Gain (loss) on asset dispositions and impairments, net		447,681
Income from operations		9,280,969
Other income (expense):
Other expense, net		805,093
Income before income taxes		10,086,062
Provision for income taxes		72,814
Net income from continuing operations		10,013,248
Income from continuing operations attributable to non-controlling interests		1,505,068
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders		8,508,180
Gain on sale of discontinued operations		3,621,170
Total income (loss) from discontinued operations		3,621,170
Net income attributable to Consolidated Water Co. Ltd. stockholders		$ 12,129,350
Basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders
Continuing operations		$ 0.57
Discontinued operations		0.24
Basic earnings per share		0.81
Diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders
Continuing operations		0.56
Discontinued operations		0.24
Diluted earnings per share		$ 0.80
Weighted average number of common shares used in the determination of:
Basic earnings per share		15,025,639
Diluted earnings per share		15,137,076

Related party transactions (Det

Related party transactions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Accounts payable outstanding	$ 200,558	$ 57,410
PERC Water Corporation
Related Party Transaction [Line Items]
Purchases of services	1,349,000	10,000
Accounts payable outstanding	$ 201,000	$ 57,000

Supplemental disclosure of ca_3

Supplemental disclosure of cash flow information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Supplemental disclosure of cash flow information
Interest paid in cash	$ 9,669	$ 1,332
Non-cash transactions:
Dividends declared but not paid	1,289,854	1,282,086
Transfers from inventory to property, plant and equipment and construction in progress	73,464	443,018
Transfers from construction in progress to property, plant and equipment	1,653,501	7,755,375
Right-of-use assets obtained in exchange for new operating lease liabilities	299,992	2,429,305
Purchase of equipment through issuance of long-term debt	$ 122,292	$ 78,899