Discontinued operations - CW-Belize (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Current assets	$ 1,959,494	$ 2,229,174
Property, plant and equipment, net	725,930	841,293
Inventory, non-current	356,854	296,012
Goodwill	380,680	380,680
Intangible assets	467,575	533,767
Other assets	14,023	15,123
Total assets of discontinued operations	3,904,556	4,296,049
Total liabilities of discontinued operations	$ 646,452	$ 1,097,821