Loans payable (Details) - Paycheck Protection Program Term Note [Member] - USD ($)	Dec. 31, 2020	Apr. 30, 2020
Loans payable (Details) [Line Items]
Debt instrument amount		$ 42,100
Loan balance	$ 42,100

Face (par) amount of debt instrument at time of issuance.

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant