Leases - Lease minimum payments (Details)	Mar. 31, 2020 USD ($)
Operating leases
2020 (remaining six months)	$ 93,750
2021	195,000
2022	0
2023	0
2024	0
Thereafter	0
Total undiscounted lease payments	288,750
Less: Imputed interest	17,150
Total lease obligations	271,600
Finance leases
2020 (remaining nine months)	746,636
2021	1,492,390
2022	1,535,809
2023	1,564,028
2024	1,597,371
Thereafter	5,753,515
Total undiscounted lease payments	12,689,749
Less: Imputed interest	9,290,517
Total lease obligations	$ 3,399,232