Quarterly report pursuant to Section 13 or 15(d)

Financial instruments (Details)

v3.19.1
Financial instruments (Details) - 3 months ended Mar. 31, 2019
USD ($)
item
$ / shares
USD ($)
Financial Instruments      
Cash, insured amount     $ 800,000
Sales agreement maximum sales proceeds of stock issuance and sales $ 10,000,000    
Share Price | $ / shares   $ 1.05  
Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Change In Basis Points | item 100    
Credit Concentration Risk      
Financial Instruments      
Cash, uninsured amount     $ 10,600,000
Minimum      
Financial Instruments      
Financial Liabilities Trade Terms Period 30 days    
Minimum | Credit Availability Concentration Risk      
Financial Instruments      
Debt Instrument, Term 3 years    
Maximum      
Financial Instruments      
Financial Liabilities Trade Terms Period 60 days