Stockholders' Equity - Share Repurchase Program and Redeemable Common Stock - (Details) - USD ($)				1 Months Ended	3 Months Ended						9 Months Ended
	Aug. 18, 2020	May 01, 2020	Nov. 01, 2019	Nov. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Class of Stock [Line Items]
Issuance of common stock					$ 1,207,905		$ 7,443,798	$ 5,780,596	$ 5,307,625	$ 3,468,172
Value of share repurchase					$ 70,959	$ 235,000		$ 23,125
Class K Common Stock
Class of Stock [Line Items]
Issuance of common stock (in shares)					123,767		617,967	389,755	319,983	298,646
Issuance of common stock					$ 1,238		$ 6,180	$ 3,897	$ 3,200	$ 2,987
Repurchase of common stock (in shares)					2,500	23,500		2,500
Value of share repurchase					$ 25	$ 235		$ 25
Class K-I Common Stock
Class of Stock [Line Items]
Issuance of common stock (in shares)					19,623		137,312	174,463	146,495	54,156
Issuance of common stock					$ 196		$ 1,373	$ 1,745	$ 1,465	$ 542
Shares issued price per share					$ 10.00						$ 10.00
Repurchase of common stock (in shares)					6,332
Value of share repurchase					$ 63
Class K-T Common Stock
Class of Stock [Line Items]
Issuance of common stock (in shares)							2,000	27,500	5,540
Issuance of common stock							$ 20	$ 275	$ 56
Shares issued price per share					$ 10.00						$ 10.00
A&R SRP | Class K Common Stock
Class of Stock [Line Items]
Percentage of weighted average number of shares outstanding											5.00%
Minimum balance required to be maintained by stockholders											$ 2,000
Maximum balance of shares requested to be repurchased											100
Prior period of share repurchase											15 days
Repurchase requests period											30 days
A&R SRP | Class K-I Common Stock
Class of Stock [Line Items]
Percentage of weighted average number of shares outstanding											5.00%
Minimum balance required to be maintained by stockholders											$ 2,000
Maximum balance of shares requested to be repurchased											100
Prior period of share repurchase											15 days
Repurchase requests period											30 days
A&R SRP | Class K-T Common Stock
Class of Stock [Line Items]
Percentage of weighted average number of shares outstanding											5.00%
Minimum balance required to be maintained by stockholders											$ 2,000
Maximum balance of shares requested to be repurchased											100
Prior period of share repurchase											15 days
Repurchase requests period											30 days
Two outstanding repurchase requests | Class K Common Stock
Class of Stock [Line Items]
Repurchase of common stock (in shares)	2,500	23,500	4,278
Value of share repurchase	$ 20,875	$ 235,000	$ 42,781
Average Price Paid per Share	$ 8.35	$ 10.00	$ 10.00
Two outstanding repurchase requests | Class K-I Common Stock
Class of Stock [Line Items]
Repurchase of common stock (in shares)	6,332
Value of share repurchase	$ 50,084
Average Price Paid per Share	$ 7.91
Two outstanding repurchase requests | Class K-T Common Stock | Subsequent Events
Class of Stock [Line Items]
Repurchase of common stock (in shares)				1,000
Value of share repurchase				$ 7,920
Average Price Paid per Share				$ 7.92
One unfilled standard repurchase requests | Class K Common Stock
Class of Stock [Line Items]
Repurchase of common stock (in shares)												2,500
Value of share repurchase												$ 23,125
Average Price Paid per Share												$ 9.25