Interest, advances and promissory notes payable (Details) - Summary of Interest Payable Activity - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of Interest Payable Activity [Abstract]
Beginning Balance	$ 5,364,997	$ 4,836,127	$ 4,307,256	$ 3,629,913
Interest incurred on promissory notes payable	265,834	528,870	528,871	504,873
Transfer from implicit interest to interest payable on promissory note				172,470
Ending Balance	$ 5,630,831	$ 5,364,997	$ 4,836,127	$ 4,307,256

Amount of interest payable on debt, including, but not limited to, trade payables.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

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