Commitments - Operating leases, supplemental balance sheet information (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Right-of-use assets, net	$ 302,990	$ 344,574
Current lease obligations	176,616	172,310
Non-current lease obligations	117,142	163,198
Total lease liabilities	$ 293,758	$ 335,508