Basis of Presentation	12 Months Ended
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation. These consolidated financial statements include the accounts of Flexible Solutions International, Inc. (the “Company”), its wholly-owned subsidiaries Flexible Fermentation Ltd. , NanoChem Solutions Inc. (“NanoChem”), Flexible Solutions Ltd., Flexible Biomass LP, FS Biomass Inc., NCS Deferred Corp., Conserve H2O Ltd., Natural Chem SEZC Ltd., and InnFlex Holdings Inc. and its 65% interest in ENP Investments, LLC (“ENP Investments”) and ENP Realty, LLC (“ENP Realty”). All inter-company balances and transactions have been eliminated upon consolidation. The Company was incorporated on May 12, 1998 in the State of Nevada and had no operations until June 30, 1998. In 2019, the Company redomiciled into Alberta, Canada. In 2018, NanoChem, a wholly-owned subsidiary of the Company, completed the purchase of a 65% interest in ENP Investments for an aggregate purchase price of $5,110,560. An unrelated party owns the remaining 35% interest in ENP Investments, and ENP Investments is consolidated into the financial statements. The outside investor’s ownership interest in ENP Investments is included in noncontrolling interests in these consolidated financial statements from the acquisition date onward. In 2020, ENP Investments increased their investment in ENP Realty from 24% to 100%, making ENP Realty a wholly-owned subsidiary of ENP Investments. ENP Realty is consolidated into the financial statements. The Company and its subsidiaries develop, manufacture and market specialty chemicals which slow the evaporation of water. One product, HEATSAVR®, is marketed for use in swimming pools and spas where its use, by slowing the evaporation of water, allows the water to retain a higher temperature for a longer period of time and thereby reduces the energy required to maintain the desired temperature of the water in the pool. Another product, WATERSAVR®, is marketed for water conservation in irrigation canals, aquaculture, and reservoirs where its use slows water loss due to evaporation. In addition to the water conservation products, the Company also manufactures and markets water-soluble chemicals utilizing thermal polyaspartate biopolymers (hereinafter referred to as “TPAs”), which are beta-proteins manufactured from the common biological amino acid, L-aspartic. TPAs can be formulated to prevent corrosion and scaling in water piping within the petroleum, chemical, utility and mining industries. TPAs are also used as proteins to enhance fertilizers in improving crop yields and can be used as additives for household laundry detergents, consumer care products and pesticides. The TPA division also manufactures two nitrogen conservation products for agriculture that slows nitrogen loss from fields. The outbreak of the novel strain of coronavirus, specifically identified as “COVID-19”, has resulted in a widespread health crisis that has affected economies and financial markets around the world resulting in an economic downturn. This outbreak may also cause staff shortages, reduced customer demand, increased government regulations or interventions, all of which may negatively impact the business, financial condition or results of options of the Company. The duration and impact of the COVID-19 outbreak is unknown at this time and it is not possible to reliably estimate the length and severity of these developments.

Basis of Presentation

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

1. Basis of Presentation.

These consolidated financial statements include the accounts of Flexible Solutions International, Inc. (the “Company”), its wholly-owned subsidiaries Flexible Fermentation Ltd. , NanoChem Solutions Inc. (“NanoChem”), Flexible Solutions Ltd., Flexible Biomass LP, FS Biomass Inc., NCS Deferred Corp., Conserve H2O Ltd., Natural Chem SEZC Ltd., and InnFlex Holdings Inc. and its 65% interest in ENP Investments, LLC (“ENP Investments”) and ENP Realty, LLC (“ENP Realty”). All inter-company balances and transactions have been eliminated upon consolidation. The Company was incorporated on May 12, 1998 in the State of Nevada and had no operations until June 30, 1998. In 2019, the Company redomiciled into Alberta, Canada.

In 2018, NanoChem, a wholly-owned subsidiary of the Company, completed the purchase of a 65% interest in ENP Investments for an aggregate purchase price of $5,110,560. An unrelated party owns the remaining 35% interest in ENP Investments, and ENP Investments is consolidated into the financial statements. The outside investor’s ownership interest in ENP Investments is included in noncontrolling interests in these consolidated financial statements from the acquisition date onward. In 2020, ENP Investments increased their investment in ENP Realty from 24% to 100%, making ENP Realty a wholly-owned subsidiary of ENP Investments. ENP Realty is consolidated into the financial statements.

The Company and its subsidiaries develop, manufacture and market specialty chemicals which slow the evaporation of water. One product, HEATSAVR®, is marketed for use in swimming pools and spas where its use, by slowing the evaporation of water, allows the water to retain a higher temperature for a longer period of time and thereby reduces the energy required to maintain the desired temperature of the water in the pool. Another product, WATERSAVR®, is marketed for water conservation in irrigation canals, aquaculture, and reservoirs where its use slows water loss due to evaporation. In addition to the water conservation products, the Company also manufactures and markets water-soluble chemicals utilizing thermal polyaspartate biopolymers (hereinafter referred to as “TPAs”), which are beta-proteins manufactured from the common biological amino acid, L-aspartic. TPAs can be formulated to prevent corrosion and scaling in water piping within the petroleum, chemical, utility and mining industries. TPAs are also used as proteins to enhance fertilizers in improving crop yields and can be used as additives for household laundry detergents, consumer care products and pesticides. The TPA division also manufactures two nitrogen conservation products for agriculture that slows nitrogen loss from fields.

The outbreak of the novel strain of coronavirus, specifically identified as “COVID-19”, has resulted in a widespread health crisis that has affected economies and financial markets around the world resulting in an economic downturn. This outbreak may also cause staff shortages, reduced customer demand, increased government regulations or interventions, all of which may negatively impact the business, financial condition or results of options of the Company. The duration and impact of the COVID-19 outbreak is unknown at this time and it is not possible to reliably estimate the length and severity of these developments.