Stockholders' Equity - Additional Information (Details)		12 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) vote $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares
Class of Stock [Line Items]
Common stock, shares authorized (in shares) | shares		900,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.01
Preferred stock, shares authorized (in shares) | shares		50,000,000	50,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Share-based compensation expense | $		$ 29,250	$ 25,000
Common Stock
Class of Stock [Line Items]
Number of shares sold | shares	22,100
Offering price per share (in dollars per share) | $ / shares	$ 9.05
Cash received from shares sold | $	$ 200,005
Common Stock | Restricted Stock
Class of Stock [Line Items]
Number of shares granted (in shares) | shares		2,500	2,500
Offering price per share (in dollars per share) | $ / shares		$ 11.70	$ 10.00
Class A
Class of Stock [Line Items]
Common stock, shares authorized (in shares) | shares		850,000,000	850,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Number of votes per share | vote		1
Class T
Class of Stock [Line Items]
Common stock, shares authorized (in shares) | shares		50,000,000	50,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Number of votes per share | vote		1