Summary of Significant Accounting Policies - Additional Information (Details)		1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2016 USD ($)	Oct. 31, 2021 USD ($)	Sep. 30, 2022 USD ($) shares	Sep. 30, 2021 USD ($) shares	Sep. 30, 2022 USD ($) Loan shares	Sep. 30, 2021 USD ($) shares	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Market value of collateral at least equal to repurchase price in case of reverse repurchase agreement, percentage					100.00%
Market value of collateral at least equal to repurchase price in case of other reverse repurchase agreements percentage					102.00%
Outstanding reverse repurchase agreements			$ 0		$ 0
Collateral							$ 45,000,000.0
Repurchase liability							$ 44,774,963
Percentage of non-cash PIK interest			4.40%	2.40%	8.80%	4.50%
Percentage of minimum beneficial ownership of voting securities for control					25.00%
Percentage of minimum board representation for control					50.00%
Percentage of maximum board representation					50.00%
Percentage of minimum net ordinary income for each calendar for distribution					98.00%
Percentage of minimum capital gains exceed capital losses for distribution for one year period					98.20%
Percentage of minimum distribution amount exceeds distributions for year					4.00%
Potentially dilutive securities outstanding | shares			0	0	0	0
Dividends common stock			$ 13,450,710	$ 11,114,754	$ 37,005,717	$ 34,597,684
Dividends common stock cash			12,783,588	$ 2,713,539	$ 26,708,902	$ 7,602,878
Initial Private Offering | Runway Growth Holdings LLC
Summary Of Significant Accounting Policies [Line Items]
Organization and offering costs	$ 1,000,000
Second Private Offering
Summary Of Significant Accounting Policies [Line Items]
Offering cost excluding placement agent fees								$ 600,000
Placement agent fees								186,198
Offering cost								$ 651,991
IPO
Summary Of Significant Accounting Policies [Line Items]
Offering cost		$ 6,970,599
Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of beneficial ownership of voting securities					5.00%
Maximum
Summary Of Significant Accounting Policies [Line Items]
Percentage of beneficial ownership of voting securities					25.00%
Maximum | Initial Private Offering
Summary Of Significant Accounting Policies [Line Items]
Organization and offering costs	$ 1,000,000
Mojix Inc
Summary Of Significant Accounting Policies [Line Items]
Number of loans | Loan							6
Pivot3 Holdings, Inc.
Summary Of Significant Accounting Policies [Line Items]
Write off accrued and uncollected paid in kind interest					$ 0		$ 0
Number of loans | Loan					1		1
Aggregate principal funded on non-accrual status			19,172,353		$ 19,172,353
Fair value on non-accrual status			$ 4,467,041		$ 4,467,041
Percentage of net assets on non-accrual status			0.50%		0.50%
Total interest					$ 3,132,309
Loan not been on non-accrual status, payable,			$ 2,880,626		2,880,626
Original issue discount					$ 251,683
Mojix Inc and Pivot3 Holdings, Inc.
Summary Of Significant Accounting Policies [Line Items]
Aggregate principal funded on non-accrual status							$ 30,278,707
Fair value on non-accrual status							$ 28,259,976
Percentage of net assets on non-accrual status							3.90%
Total interest							$ 4,760,387
Loan not been on non-accrual status, payable,							4,064,620
Original issue discount							$ 695,767