Quarterly report pursuant to Section 13 or 15(d)

Note 13 - Share-based Compensation (Details Textual)

v3.19.1
Note 13 - Share-based Compensation (Details Textual) - shares
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Nov. 06, 2018
Common Stock, Capital Shares Reserved for Future Issuance 1,591,481      
The 2012 DSU Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 0 0    
Common Stock, Capital Shares Reserved for Future Issuance 100,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 21,183      
Option Plan [Member]        
Common Stock, Capital Shares Reserved for Future Issuance       783,918
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance     674,045  
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares       283,918
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years  
The 2012 DSU Plan and Option Plan [Member]        
Common Stock, Capital Shares Reserved for Future Issuance 783,918