001 - Document - DOCUMENT AND ENTITY INFORMATION link:presentationLink link:definitionLink link:calculationLink 002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:definitionLink link:calculationLink 003 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS [Parenthetical] link:presentationLink link:definitionLink link:calculationLink 004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:definitionLink link:calculationLink 005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:definitionLink link:calculationLink 006 - Disclosure - Description of business and summary of significant accounting policies link:presentationLink link:definitionLink link:calculationLink 007 - Disclosure - Loss per Common Share link:presentationLink link:definitionLink link:calculationLink 008 - Disclosure - Convertible debentures link:presentationLink link:definitionLink link:calculationLink 009 - Disclosure - Common Stock link:presentationLink link:definitionLink link:calculationLink 010 - Disclosure - Warrants link:presentationLink link:definitionLink link:calculationLink 011 - Disclosure - Stock-based compensation link:presentationLink link:definitionLink link:calculationLink 012 - Disclosure - Warrant liability link:presentationLink link:definitionLink link:calculationLink 013 - Disclosure - Related parties link:presentationLink link:definitionLink link:calculationLink 014 - Disclosure - Commitments and Contingencies link:presentationLink link:definitionLink link:calculationLink 015 - Disclosure - Fair value measurements link:presentationLink link:definitionLink link:calculationLink 016 - Disclosure - Subsequent events link:presentationLink link:definitionLink link:calculationLink 017 - Disclosure - Description of business and summary of significant accounting policies (Policies) link:presentationLink link:definitionLink link:calculationLink 018 - Disclosure - Loss per common share (Tables) link:presentationLink link:definitionLink link:calculationLink 019 - Disclosure - Warrants (Tables) link:presentationLink link:definitionLink link:calculationLink 020 - Disclosure - Stock-based compensation (Tables) link:presentationLink link:definitionLink link:calculationLink 021 - Disclosure - Fair value measurements (Tables) link:presentationLink link:definitionLink link:calculationLink 022 - Disclosure - Description of business and summary of significant accounting policies (Details Textual) link:presentationLink link:definitionLink link:calculationLink 023 - Disclosure - Loss per common share (Details) link:presentationLink link:definitionLink link:calculationLink 024 - Disclosure - Convertible debentures (Details Textual) link:presentationLink link:definitionLink link:calculationLink 025 - Disclosure - Common Stock (Details Textual) link:presentationLink link:definitionLink link:calculationLink 026 - Disclosure - Warrants (Details) link:presentationLink link:definitionLink link:calculationLink 027 - Disclosure - Warrants (Details Textual) link:presentationLink link:definitionLink link:calculationLink 028 - Disclosure - Stock-based compensation (Details) link:presentationLink link:definitionLink link:calculationLink 029 - Disclosure - Stock-based compensation (Details Textual) link:presentationLink link:definitionLink link:calculationLink 030 - Disclosure - Warrant liability (Details Textual) link:presentationLink link:definitionLink link:calculationLink 031 - Disclosure - Related parties (Details Textual) link:presentationLink link:definitionLink link:calculationLink 032 - Disclosure - Commitments and Contingencies (Details Textual) link:presentationLink link:definitionLink link:calculationLink 033 - Disclosure - Fair value measurements (Details) link:presentationLink link:definitionLink link:calculationLink 034 - Disclosure - Fair value measurements (Details Textual) link:presentationLink link:definitionLink link:calculationLink