Potomac Amendment (Details)		5 Months Ended	12 Months Ended
	Apr. 12, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jul. 31, 2017 USD ($)
Investments, All Other Investments [Line Items]
General and administrative		$ 5,887,135	$ 11,263,804	$ 10,313,000	$ 6,530,533
Potomac Amendment
Investments, All Other Investments [Line Items]
Term of investment agreement	4 years
Price of right to buy back interest	$ 382,875
Percent of interest	2.5525%
Earliest period of notice	2 years 6 months
Payment ratio	2
Period of payment after notice	10 days
Latest period of notice, payment ratio	3.5
Payment period	15 days
General and administrative				$ 159,500	$ 159,500
Counterparty right of net profit percentage	2.5525%
Counterparty right of net proceeds upon divestiture	2.5525%
Minimum payment receivable	$ 3,000,000
Net profit determination, percent of actual amounts received	50.00%
Potomac Amendment Agreement 3
Investments, All Other Investments [Line Items]
Term of investment agreement	5 years
Price of right to buy back interest	$ 500,000
Percent of interest	0.98%
Earliest period of notice	3 years 3 months
Payment ratio	1.8
Period of payment after notice	10 days
Latest period of notice, payment ratio	3.15
Potomac Amendment Agreement 4
Investments, All Other Investments [Line Items]
Term of investment agreement	5 years
Price of right to buy back interest	$ 500,000
Percent of interest	0.98%
Earliest period of notice	3 years 3 months
Payment ratio	1.8
Period of payment after notice	10 days
Potomac Amendment Agreement 5
Investments, All Other Investments [Line Items]
Term of investment agreement	5 years
Price of right to buy back interest	$ 500,000
Percent of interest	0.75%
Earliest period of notice	3 years 3 months
Payment ratio	1.8
Period of payment after notice	10 days
Latest period of notice, payment ratio	3.15
Potomac Amendment Agreement 5, Additional
Investments, All Other Investments [Line Items]
Term of investment agreement	5 years
Price of right to buy back interest	$ 500,000
Percent of interest	0.75%
Earliest period of notice	3 years 3 months
Payment ratio	1.8
Period of payment after notice	10 days
Latest period of notice, payment ratio	3.15
Additional investment option	$ 1,000,000