Consolidated Schedule of Investments (Parenthetical)		1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
		Oct. 31, 2017	Sep. 30, 2018	Jun. 30, 2020 USD ($) Installment		Dec. 31, 2019 USD ($) Installment		Dec. 31, 2019 EUR (€)		Mar. 31, 2019 USD ($)	Mar. 31, 2019 EUR (€)
Ghana [Member] | Genser Energy Ghana Ltd | Electric Services [Member] | Power Producer [Member]
Extended maturity date		Aug. 31, 2022
Entire principal amount						$ 1,070,000
Principal and interest starting date						Jan. 31, 2021
Ghana [Member] | Other Investments [Member] | Electric Services [Member] | Power Producer [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount	[1],[2]					$ 15,000,000
Maturity	[1],[2],[3]					Nov. 12, 2022		Nov. 12, 2022
Peru [Member] | Kinder Investments, Ltd. [Member] | Consumer Products [Member] | Diaper Manufacturer | Inventory Facility [Member]
Extended maturity date				Dec. 31, 2024		Aug. 15, 2021
Nigeria [Member] | Other Investments [Member] | Water Transportation [Member] | Marine Logistics Provider [Member]
Deferred interest rate included in investment interest accruing				4.68%		4.68%
Nigeria [Member] | Other Investments [Member] | Water Transportation [Member] | Marine Logistics Provider [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount	[1],[4]					$ 12,762,670
Maturity	[1],[3],[4]					Sep. 16, 2020		Sep. 16, 2020
Nigeria [Member] | Other Investments [Member] | Water Transportation [Member] | Marine Logistics Provider [Member] | One-Month Libor [Member]
Variable interest rate				10.50%		10.50%
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader III [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[1]			$ 675,256	[5],[6]	$ 675,256	[7],[8]
Maturity	[1],[3]			Aug. 31, 2020	[5],[6]	Apr. 30, 2020	[7],[8]	Apr. 30, 2020	[7],[8]
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader II [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[1]			$ 838,967	[5],[6]	$ 838,967	[7],[8]
Maturity	[1],[3]			Aug. 31, 2020	[5],[6]	Apr. 30, 2020	[7],[8]	Apr. 30, 2020	[7],[8]
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader | Senior Secured Trade Finance Participations [Member]
Maturity						Apr. 30, 2020		Apr. 30, 2020
Jersey [Member] | Africell Holding Limited [Member] | Telephone Communications [Member] | Mobile Network Operator [Member] | Senior Secured Term Loan Participations [Member]
Principal amount, amortization period, from initial utilization date				15 months		15 months
Quarterly amortization percentage, until IUD + 27 Months				4.50%		4.50%
Quarterly amortization percentage, until IUD + 48 Months				6.50%		6.50%
Quarterly amortization percentage, thereafter				7.50%		7.50%
Principal Amount	[1],[9]			$ 15,580,000		$ 17,290,000
Maturity	[1],[3],[9]			Mar. 28, 2023		Mar. 28, 2023		Mar. 28, 2023
New Zealand [Member] | Other Investments [Member] | Logging [Member] | Sustainable Timber Exporter [Member]
Original drawdown date				Aug. 10, 2017
New Zealand [Member] | Other Investments [Member] | Logging [Member] | Sustainable Timber Exporter [Member] | Senior Secured Term Loans [Member]
Principal and accrued interest payment description				Principal and interest paid annually. The maturity date is expected to be extended in connection with a restructure of the loan. Refer to Note 3 for additional information.		Principal and interest paid annually. The maturity date was extended to 2/28/2021 in connection with a restructure of the loan. Refer to Note 3 for additional information.
Principal Amount	[1]			$ 5,797,622	[10]	$ 5,612,436	[11]
Maturity	[1],[3]			Feb. 11, 2021	[10]	Feb. 11, 2021	[11]	Feb. 11, 2021	[11]
New Zealand [Member] | Other Investments [Member] | Logging [Member] | Sustainable Timber Exporter [Member] | Senior Secured Term Loans
Principal and accrued interest partial repayment received						$ 1,800,000
Croatia [Member] | Other Investments [Member] | Department Stores [Member] | Mall Operator [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount				$ 8,723,129	[1],[12],[13]	$ 8,519,535	[1],[14],[15]				€ 6,200,000
Investment premium included in fair value										$ 91,200
Maturity	[1],[3]			Jan. 23, 2021	[12],[13]	Jan. 23, 2021	[14],[15]	Jan. 23, 2021	[14],[15]
Croatia [Member] | Other Investments [Member] | Department Stores [Member] | Mall Operator [Member] | Senior Secured Term Loans [Member]
Principal Amount | €								€ 6,200,000
Investment premium included in fair value						$ 228,027
CHINA | Other Investments [Member] | Secondary Nonferrous Metals [Member] | Minor Metals Resource Trader [Member] | Senior Secured Term Loans [Member]
Number of quarterly installments for repayment of principal | Installment				4		4
Hong Kong [Member] | Other Investments [Member] | Secondary Nonferrous Metals [Member] | Minor Metals Resource Trader [Member] | Senior Secured Term Loans [Member]
Principal Amount	[1],[16]			$ 10,000,000		$ 10,000,000
Maturity	[1],[3],[16]			Jun. 22, 2021		Jun. 22, 2021		Jun. 22, 2021
Hong Kong [Member] | Other Investments [Member] | Coal and Other Minerals and Ores [Member] | Resource Trader [Member] | Senior Secured Term Loans [Member]
Principal Amount	[1],[17]			$ 17,166,559		$ 15,891,820
Number of quarterly installments for repayment of principal | Installment				2		4
Maturity	[1],[3],[17]			Dec. 31, 2020		Dec. 28, 2020		Dec. 28, 2020
Hong Kong [Member] | Other Investments [Member] | Coal and Other Minerals and Ores [Member] | Non-Ferrous Metal Trader [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[1],[7]					$ 16,456,270
Maturity	[1],[3],[7]					May 04, 2020		May 04, 2020
Hong Kong [Member] | Other Investments [Member] | Coal and Other Minerals and Ores [Member] | Non-Ferrous Metal Trader [Member] | Senior Secured Trade Finance Participations [Member] | Minimum [Member]
Maturity			Jan. 02, 2019
Investment maturity						2019-12
Hong Kong [Member] | Other Investments [Member] | Coal and Other Minerals and Ores [Member] | Non-Ferrous Metal Trader [Member] | Senior Secured Trade Finance Participations [Member] | Maximum [Member]
Maturity			Feb. 14, 2019
Investment maturity						2020-02
Malaysia [Member] | Other Investments [Member] | Chemicals and Allied Products [Member] | Wholesale Distributor [Member] | Senior Secured Term Loans [Member]
Principal Amount	[1]			$ 15,000,000	[18]	$ 15,000,000	[19]
Number of quarterly installments for repayment of principal | Installment				3		5
Maturity	[1],[3]			Mar. 31, 2021	[18]	Mar. 31, 2021	[19]	Mar. 31, 2021	[19]
Brazil [Member] | Usivale Industria E Commercio | Agricultural Products [Member] | Sugar Producer [Member]
Extended maturity date						Feb. 28, 2021
Namibia [Member] | Other Investments [Member] | Land Subdividers and Developers [Member] | Property Developer [Member]
Percentage of quarterly principal payment						30.00%
Principal payment start date						Jun. 30, 2020
Principal payment end date						Jun. 30, 2021
Namibia [Member] | Other Investments [Member] | Land Subdividers and Developers [Member] | Property Developer [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount	[1],[20]					$ 16,834,571
Maturity	[1],[3],[20]					Aug. 15, 2021		Aug. 15, 2021
Ecuador [Member] | Other Investments [Member] | Commercial Fishing [Member] | Fish Processor & Exporter [Member] | Senior Secured Trade Finance Participations [Member]
Extended maturity date			Jun. 19, 2019
Principal Amount	[1],[22]			$ 35,838	[21]	$ 35,838	[23]
Maturity	[1],[3],[22]			Jun. 19, 2019	[21]	Jun. 19, 2019	[23]	Jun. 19, 2019	[23]
Cameroon [Member] | Other Investments [Member] | Chocolate and Cocoa Products [Member] | Cocoa & Coffee Exporter [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[1],[24]					$ 10,413,683
Maturity	[1],[3],[24]					Aug. 31, 2019		Aug. 31, 2019
Cameroon [Member] | Other Investments [Member] | Chocolate and Cocoa Products [Member] | Cocoa & Coffee Exporter [Member] | Senior Secured Trade Finance Participations [Member] | Maximum [Member]
Maturity						Apr. 30, 2020		Apr. 30, 2020

[1] Refer to Notes 2, 3 and 4 of the consolidated financial statements for additional information on the Company’s investments.

[2] Semi-annual interest payments. Semi-annual principal payment of $1.07 million starting January 31, 2021 with remaining balance due at maturity.

[3] Trade finance borrowers may be granted flexibility with respect to repayment relative to the stated maturity date to accommodate specific contracts and/or business cycle characteristics. This flexibility in each case is agreed upon between the Company and the sub-advisor and between the sub-advisor and the borrower.

[4] Interest accrues at a variable rate of one-month Libor + 10.5%, which is paid currently, and also includes 4.68% of deferred interest due at maturity.

[5] Principal and interest to be paid at maturity.

[6] The Company is currently working on extending the maturity dates of these investments. These extensions are anticipated to be finalized during the third quarter of 2020.

[7] Principal and interest paid at maturity.

[8] The Company extended the maturity dates of these investments during the fourth quarter of 2019 to 4/30/2020.

[9] Quarterly interest payments. Principal to start amortizing 15 months from initial utilization date (IUD) as follows: 4.5% of loan balance quarterly until IUD + 27 months, then 6.5% of loan balance quarterly until IUD + 48 months, thereafter 7.5% of loan balance quarterly until maturity.

[10] Two-thirds and one-third of the principal and accrued interest to be paid on the 36th and 42nd months after original drawdown date of 8/10/2017, respectively.

[11] Two-thirds and one-third of the principal and accrued interest to be paid on the 36th and 42nd months after original drawdown date of 8/10/2017, respectively. Subsequent to 9/30/2019, $1.8 million was received as partial repayment.

[12] Loan is denominated in euro currency with a principal amount of 6,200,000 euro; however, the Company’s participation is denominated in US dollars. The quarterly interest payments are paid at the current exchange rate and subject to foreign currency fluctuations. The fair value includes an investment premium of $91,200.

[13] Quarterly interest only payment. Principal due at maturity.

[14] Loan is denominated in euro currency with a principal amount of 6,200,000 euro, however the Company’s participation is denominated in US dollars. The quarterly interest payments are paid at the current exchange rate and subject to foreign currency fluctuations. The fair value includes an investment premium of $228,027.

[15] Semi-annual interest only payment. Principal due at maturity.

[16] Interest paid quarterly. Principal to be repaid in four equal quarterly installments starting in September 2020.

[17] Interest paid quarterly. Principal to be repaid in four equal quarterly installments starting in March 2020.

[18] Interest paid quarterly. Principal to be repaid in three quarterly installments starting in September 2020.

[19] Interest paid quarterly. Principal to be repaid in five equal quarterly installments starting in March 2020.

[20] Quarterly interest payments. Principal payments of 30% of total principal balance disbursed to be repaid on 6/30/2020 and 6/30/2021, with the remaining principal to be paid at maturity.

[21] IIG was the sub-advisor for this investment, See Note 3 for additional information about IIG.

[22] Monthly interest only payment. Principal due at maturity.

[23] During the third quarter 2018, the maturity date of this investment was extended to 6/19/2019.

[24] Watch List investment. Refer to Note 3 for additional information.