Preferred Stock (Details)	3 Months Ended
	Mar. 31, 2021 USD ($) extension shares	Mar. 31, 2020 USD ($)
Subsidiary, Sale of Stock [Line Items]
Number of extensions | extension	2
Term of extension	1 year
Proceeds from issuance of preferred stock, net of issuance costs	$ 9,363,586	$ 7,016,263
2019 Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Annualized rate of return	5.50%
Proceeds from issuance of preferred stock, net of issuance costs	$ 10,777,000	7,898,000
Preferred dividend value incurred	$ 488,000	$ 61,000
Preferred stock outstanding (in shares) | shares	4,387,688