Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Note 11 - Derivative Warrant Liabilities (Details Textual)

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Note 11 - Derivative Warrant Liabilities (Details Textual) - $ / shares
Mar. 31, 2018
Dec. 27, 2017
Mar. 31, 2017
Feb. 28, 2017
Warrant liabilities issued December 27, 2017 [member]        
Statement Line Items [Line Items]        
Fair value per shares issuable warrants $ 0.65 $ 0.60 $ 0 $ 0
Warrant liabilities issued December 3, 2013 [member]        
Statement Line Items [Line Items]        
Fair value per shares issuable warrants $ 0.01   $ 0.11 $ 0.10
Number of required warrants to be exercised to obtain one common share 10