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CONSOLIDATED STATEMENTS OF INCOME - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Retail revenues | $ 23,225,066 | $ 23,505,619 | $ 23,254,757
Bulk revenues | 31,621,756 | 29,647,034 | 31,854,255
Services revenues | 469,347 | 835,770 | 2,007,190
Manufacturing revenues | 6,990,496 | 3,887,284 | 0
Total revenues | 62,306,665 | 57,875,707 | 57,116,202
Cost of retail revenues | 10,372,199 | 10,294,298 | 10,543,972
Cost of bulk revenues | 21,066,207 | 19,488,550 | 21,634,789
Cost of services revenues | 469,797 | 751,139 | 1,629,221
Cost of manufacturing revenues | 4,963,962 | 3,090,834 | 0
Total cost of revenues | 36,872,165 | 33,624,821 | 33,807,982
Gross profit | 25,434,500 | 24,250,886 | 23,308,220
General and administrative expenses | 19,072,979 | 18,677,584 | 14,840,156
Long-lived asset impairment and disposition losses, net | 3,040,158 | 3,435,619 | 32,566
Income from operations | 3,321,363 | 2,137,683 | 8,435,498
Other income (expense): |  |  |
Interest income | 380,563 | 609,750 | 1,013,252
Interest expense | (6,806) | (104,048) | (269,090)
Profit sharing income from OC-BVI | 46,575 | 125,550 | 105,300
Equity in the earnings of OC-BVI | 127,802 | 337,809 | 294,368
Impairment loss on investment in OC-BVI | 0 | (925,000) | (1,060,000)
Net unrealized gain (loss) on put/call options | 960,000 | (297,000) | 0
Other | 14,099 | 356,512 | (593,834)
Other income (expense), net | 1,522,233 | 103,573 | (510,004)
Income before income taxes | 4,843,596 | 2,241,256 | 7,925,494
Provision for (benefit from) income taxes | (888,977) | (536,057) | 0
Net income | 5,732,573 | 2,777,313 | 7,925,494
Income (loss) attributable to non-controlling interests | (411,489) | (1,183,188) | 406,793
Net income attributable to Consolidated Water Co. Ltd. stockholders | $ 6,144,062 | $ 3,960,501 | $ 7,518,701
Basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders | $ 0.41 | $ 0.27 | $ 0.51
Diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders | 0.41 | 0.27 | 0.51
Dividends declared per common share | $ 0.31 | $ 0.3 | $ 0.30
Weighted average number of common shares used in the determination of: |  |  |
Basic earnings per share | 14,896,944 | 14,809,909 | 14,741,748
Diluted earnings per share | 15,006,681 | 14,944,028 | 14,827,755

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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1505-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1448-109256 + Details
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