Debt - Narratives - Term Loan (Details) - USD ($)		1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 01, 2022	Sep. 30, 2022	Aug. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Apr. 09, 2022
Debt Instrument
Deferred financing costs		$ 24,279,081		$ 24,279,081		$ 24,279,081		$ 4,170,164
Payment of financing costs						0	$ 1,290,829
Aggregated principal amount		63,375,000		63,375,000		63,375,000		43,375,000
Stated interest expense				768,500	$ 733,611	2,299,538	1,940,490
Cash and cash equivalents		$ 24,321,951		$ 24,321,951	$ 21,368,283	$ 24,321,951	$ 21,368,283	$ 12,232,256
Term Loan
Debt Instrument
Covenant Compliance						As of September 30, 2022 and December 31, 2021, Terra BDC was in compliance with these covenants.		As of September 30, 2022 and December 31, 2021, Terra BDC was in compliance with these covenants.
Terra BDC | Term Loan
Debt Instrument
Delayed draw term loan									$ 25,000,000
Minimum Incremental loan									1,000,000
Loan in excess									$ 500,000
Maturity Date	Jul. 01, 2023					Apr. 09, 2025
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		5.625%		5.625%		5.625%
Long Term Debt Percentage Interest Rate above investment grade rating		6.625%		6.625%		6.625%
Long term debt upfront fee percent		2.50%		2.50%		2.50%
Term Loan Commitment Fee Percentage						0.75%
Proceeds from Issuance of Secured Debt		$ 20,000,000	$ 5,000,000
Debt Instrument, Fee Amount			$ 600,000
Deferred financing costs		300,000		$ 300,000		$ 300,000
Amount outstanding		$ 25,000,000		$ 25,000,000		$ 25,000,000		$ 5,000,000
Covenant Description						The Credit Agreement contains customary representations, warranties, reporting requirements, borrowing conditions and affirmative, negative and financial covenants, including REIT status requirements and minimum asset coverage ratio requirements. As of September 30, 2022 and December 31, 2021, Terra BDC was in compliance with these covenants. The Credit Agreement also includes usual and customary events of default and remedies for credit agreements of this nature. Events of default under the Credit Agreement include, but are not limited to: (i) the failure by Terra BDC to make any payments when due under the Credit Agreement; (ii) the failure of Terra BDC to perform or observe any term, covenant or agreement under the Credit Agreement or any other loan document, subject to applicable cure periods; (iii) an event of default on other material indebtedness of Terra BDC; (iv) the bankruptcy or insolvency of Terra BDC; and (v) judgments and attachments, with customary limits and grace periods, against Terra BDC or its property. In addition, the Loans are subject to mandatory prepayment, at the option of each Lender, upon a change in control of Terra BDC (as defined by the Credit Agreement).