Investment in OC-BVI - Income statement details (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Investment in OC-BVI
Revenue	$ 3,146,550	$ 2,845,211
Cost of revenue	2,156,460	1,348,046
Gross profit	990,090	1,497,165
General and administrative expenses	781,677	707,034
Gain on long-lived asset disposition	1,000	0
Income from operations	209,413	790,131
Other income (expense), net	(32,341)	3,393,271
Net income	177,072	4,183,402
Income attributable to non-controlling interests	74,233	52,275
Net income attributable to controlling interests	$ 102,839	$ 4,131,127