Consolidated Schedule of Investments (Parenthetical)					1 Months Ended	3 Months Ended							6 Months Ended		12 Months Ended
		Jul. 31, 2019 USD ($)	May 01, 2019 USD ($)	Apr. 01, 2019	Oct. 31, 2017	Sep. 30, 2019	Jun. 30, 2019 USD ($)		Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)		Sep. 30, 2018	Jun. 30, 2019 USD ($) Installment		Dec. 31, 2018 USD ($) Installment		Mar. 31, 2019 EUR (€)	Dec. 31, 2018 EUR (€)
Purchase of investments													$ 16,675,000
Ghana [Member] | Genser Energy Ghana Ltd. [Member] | Electric Services [Member] | Power Producer [Member]
Extended maturity date					Aug. 31, 2022
Ghana [Member] | Genser Energy Ghana Ltd. [Member] | Electric Services [Member] | Power Producer [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount	[2]						$ 18,527,237	[1]		$ 18,527,237	[3]		$ 18,527,237	[1]	$ 18,527,237	[3]
Maturity	[2],[4]												Aug. 31, 2022	[1]	Aug. 31, 2022	[3]
Interest	[2]												12.46%	[1]	12.90%	[3]
Ghana [Member] | Other Investments [Member] | Financial Services [Member] | Funds Held in Escrow [Member] | Short Term Investments [Member]
Principal Amount	[2],[5]									$ 394,946					$ 394,946
Interest	[2],[5]														15.34%
Ghana [Member] | Other Investments [Member] | Financial Services [Member] | Funds Held in Escrow [Member] | Three-month Libor [Member] | Short Term Investments [Member]
Interest															13.00%
Peru [Member] | Kinder Investments, Ltd. [Member] | Consumer Products [Member] | Diaper Manufacturer | Inventory Facility [Member]
Extended maturity date													Aug. 15, 2021		Aug. 15, 2021
Nigeria [Member] | Other Investments [Member]
Maturity										Mar. 27, 2019
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	[2],[6]						12,738,503			$ 12,762,670			$ 12,738,503		$ 12,762,670
Maturity	[2],[4],[6]												Sep. 16, 2020		Sep. 16, 2020
Interest	[2],[6]												12.94%		12.85%
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	[2],[8]						920,634	[7]		$ 1,275,451	[9]		$ 920,634	[7]	$ 1,275,451	[9]
Maturity										Mar. 27, 2019			Mar. 27, 2019	[2],[4],[7],[8]	Mar. 27, 2019	[2],[4],[8],[9]
Interest	[2],[8]												16.77%	[7]	16.77%	[9]
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader III [Member] | Senior Secured Trade Finance Participations [Member] | Scenario Forecast [Member]
Maturity						Aug. 31, 2019
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trade ll [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[2],[8],[9]									$ 1,329,575					$ 1,329,575
Maturity										Mar. 27, 2019					Mar. 27, 2019	[2],[4],[8],[9]
Interest	[2],[8],[9]														16.77%
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trade ll [Member] | Senior Secured Trade Finance Participations [Member] | Scenario Forecast [Member]
Maturity						Aug. 31, 2019
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[2],[8]						755,466	[7]		$ 448,697	[10]		$ 755,466	[7]	$ 448,697	[10]
Maturity	[2],[4],[7],[8]												Mar. 27, 2019
Purchase of investments									$ 147,679
Interest	[2],[8]												16.77%	[7]	16.77%	[10]
Investment maturity															2018-12
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader [Member] | Senior Secured Trade Finance Participations [Member] | Scenario Forecast [Member]
Maturity						Aug. 31, 2019
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader [Member] | Senior Secured Trade Finance Participations [Member] | Minimum [Member]
Maturity	[2],[4],[8],[10]														Dec. 27, 2018
Nigeria [Member] | Other Investments [Member] | Farm Products [Member] | Cocoa Trader [Member] | Senior Secured Trade Finance Participations [Member] | Maximum [Member]
Maturity	[2],[4],[8],[10]														Mar. 27, 2019
Namibia [Member] | Other Investments [Member] | Land Subdividers and Developers [Member] | Property Developer [Member]
Entire principal amount							2,143,500						$ 2,143,500
Principal and interest starting date													Feb. 15, 2020
Namibia [Member] | Other Investments [Member] | Land Subdividers and Developers [Member] | Property Developer [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount	[2],[11]						16,495,604			16,168,797			$ 16,495,604		$ 16,168,797
Maturity	[2],[4],[11]												Aug. 15, 2021		Aug. 15, 2021
Namibia [Member] | Trustco Group Limited [Member] | Land Subdividers and Developers [Member] | Property Developer [Member]
Entire principal amount										2,143,500					$ 2,143,500
Principal and interest starting date															Feb. 15, 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
Quarterly amortization percentage, until IUD + 27 Months													4.50%
Quarterly amortization percentage, until IUD + 48 Months													6.50%
Quarterly amortization percentage, thereafter													7.50%
Principal Amount	[2]						19,000,000	[12]		19,000,000	[13]		$ 19,000,000	[12]	$ 19,000,000	[13]
Maturity	[2],[4]												Mar. 28, 2023	[12]	Mar. 28, 2023	[13]
Interest	[2]												12.35%	[12]	12.35%	[13]
New Zealand [Member] | Other Investments [Member] | Logging [Member] | Sustainable Timber Exporter [Member]
Original drawdown date													Aug. 10, 2017		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 is expected to be extended in connection with a restructure of the loan. Refer to Note 3 for additional information.
Principal Amount	[2]						6,840,000	[14]		6,840,000	[15]		$ 6,840,000	[14]	$ 6,840,000	[15]
Maturity	[2],[4]												Feb. 10, 2021	[14]	Feb. 10, 2021	[15]
Interest	[2]												11.50%	[14]	11.50%	[15]
Croatia [Member] | Other Investments [Member] | Department Stores [Member] | Mall Operator [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount							8,287,214	[2],[16],[17]		8,034,348	[2],[13],[18]		$ 8,287,214	[2],[16],[17]	$ 8,034,348	[2],[13],[18]	€ 6,200,000
Investment premium included in fair value									$ 173,300
Maturity	[2],[4]												Jan. 23, 2021	[16],[17]	Jan. 23, 2021	[13],[18]
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					$ 228,027
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	[2],[19],[20]						35,838			35,838			$ 35,838		$ 35,838
Maturity	[2],[4],[19],[20]												Jun. 19, 2019		Jun. 19, 2019
Interest	[2],[19],[20]												9.00%		9.00%
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	[2],[8]						15,000,000	[21]		15,000,000	[22]		$ 15,000,000	[21]	$ 15,000,000	[22]
Interest	[2],[8]												11.50%	[21]	11.50%	[22]
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	Dec. 28, 2019	[2],[4],[8],[21]	Jan. 02, 2019	[2],[4],[8],[22]
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	Feb. 09, 2020	[2],[4],[8],[21]	Feb. 14, 2019	[2],[4],[8],[22]
Investment maturity									2020-02
Hong Kong [Member] | Other Investments [Member] | Coal and Other Minerals and Ores [Member] | Resource Trader [Member] | Senior Secured Term Loans [Member]
Principal Amount	[2],[23]						15,000,000			15,000,000			$ 15,000,000		$ 15,000,000
Number of quarterly installments for repayment of principal | Installment													4		4
Maturity	[2],[4],[23]												Dec. 27, 2020		Dec. 27, 2020
Interest	[2],[23]												11.50%		11.50%
Hong Kong [Member] | Other Investments [Member] | Secondary Nonferrous Metals [Member] | Minor Metals Resource Trader [Member] | Senior Secured Term Loans [Member]
Principal Amount	[2],[24]						10,000,000						$ 10,000,000
Maturity	[2],[4],[24]												Jun. 22, 2021
Interest	[2],[24]												12.00%
Hong Kong [Member] | Other Investments [Member] | Telephone and Telegraph Apparatus [Member] | Mobile Phone Distributor [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[2]						$ 9,500,000	[17],[25]		7,000,000	[13],[26]		$ 9,500,000	[17],[25]	$ 7,000,000	[13],[26]
Maturity							Jul. 09, 2019
Interest	[2],[13],[26]														10.00%
Hong Kong [Member] | Other Investments [Member] | Telephone and Telegraph Apparatus [Member] | Mobile Phone Distributor [Member] | Senior Secured Trade Finance Participations [Member] | Minimum [Member]
Maturity									Apr. 10, 2019				Jul. 07, 2019	[2],[4],[17],[25]	Jan. 20, 2019	[2],[4],[13],[26]
Interest	[2],[17],[25]												12.00%
Hong Kong [Member] | Other Investments [Member] | Telephone and Telegraph Apparatus [Member] | Mobile Phone Distributor [Member] | Senior Secured Trade Finance Participations [Member] | Maximum [Member]
Maturity									May 03, 2019				Jul. 09, 2019	[2],[4],[17],[25]	Feb. 01, 2019	[2],[4],[13],[26]
Interest	[2],[17],[25]												14.00%
Cameroon [Member] | Other Investments [Member] | Chocolate and Cocoa Products [Member] | Cocoa & Coffee Exporter [Member] | Senior Secured Trade Finance Participations [Member]
Principal Amount	[2]						$ 10,718,201	[7]		$ 10,718,201	[9]		$ 10,718,201	[7]	$ 10,718,201	[9]
Maturity										Mar. 27, 2019			Mar. 27, 2019	[2],[4],[7]	Mar. 27, 2019	[2],[4],[9]
Cameroon [Member] | Other Investments [Member] | Chocolate and Cocoa Products [Member] | Cocoa & Coffee Exporter [Member] | Senior Secured Trade Finance Participations [Member] | Scenario Forecast [Member]
Maturity						Aug. 31, 2019
Cameroon [Member] | Other Investments [Member] | Chocolate and Cocoa Products [Member] | Cocoa & Coffee Exporter [Member] | Senior Secured Trade Finance Participations [Member] | Minimum [Member]
Interest	[2]												16.42%	[7]	16.42%	[9]
Cameroon [Member] | Other Investments [Member] | Chocolate and Cocoa Products [Member] | Cocoa & Coffee Exporter [Member] | Senior Secured Trade Finance Participations [Member] | Maximum [Member]
Interest	[2]												17.50%	[7]	17.50%	[9]
China [Member] | Other Investments [Member] | Secondary Nonferrous Metals [Member] | Minor Metals Resource Trader [Member] | Senior Secured Term Loans [Member]
Principal Amount	[2],[24]									$ 10,000,000					$ 10,000,000
Number of quarterly installments for repayment of principal | Installment													4		4
Maturity	[2],[4],[24]														Jun. 22, 2021
Interest	[2],[24]														12.00%
Malaysia [Member] | Other Investments [Member] | Chemicals and Allied Products [Member] | Wholesale Distributor [Member] | Senior Secured Term Loans [Member]
Principal Amount	[2],[27]						15,000,000			15,000,000			$ 15,000,000		$ 15,000,000
Number of quarterly installments for repayment of principal | Installment													5		5
Maturity	[2],[4],[27]												Mar. 31, 2021		Mar. 31, 2020
Interest	[2],[27]												12.00%		12.00%
Netherlands [Member] | Other Investments [Member] | Food Products [Member] | Fruit Juice Processor B | Short Term Investments [Member]
Extended maturity date			Jul. 31, 2019
Principal Amount	[2],[8]						3,000,000	[28]		4,000,000	[29]		$ 3,000,000	[28]	$ 4,000,000	[29]
Maturity	[2],[4],[8],[29]														Dec. 26, 2018
Purchase of investments			$ 2,000,000						$ 2,000,000
Interest	[2],[8]												10.50%	[28]	10.50%	[29]
Netherlands [Member] | Other Investments [Member] | Food Products [Member] | Fruit Juice Processor B | Short Term Investments [Member] | Scenario Forecast [Member]
Purchase of investments		$ 2,000,000
Netherlands [Member] | Other Investments [Member] | Food Products [Member] | Fruit Juice Processor B | Short Term Investments [Member] | Minimum [Member]
Maturity	[2],[4],[8],[28]												Apr. 12, 2019
Netherlands [Member] | Other Investments [Member] | Food Products [Member] | Fruit Juice Processor B | Short Term Investments [Member] | Maximum [Member]
Maturity													Jul. 31, 2019	[2],[4],[8],[28]	Jul. 31, 2019
Colombia [Member] | Azteca Comunicaciones Colombia S.A.S. [Member] | Telephone Communications [Member] | Fiber Optics Network Provider [Member] | Senior Secured Term Loan Participations [Member]
Principal Amount	[2]						19,405,950	[30],[31]		19,115,803	[32]		$ 19,405,950	[30],[31]	$ 19,115,803	[32]
Number of quarterly installments for repayment of principal | Installment															4
Maturity	[2],[4]												Oct. 15, 2023	[30],[31]	Oct. 15, 2023	[32]
South Africa [Member] | Other Investments [Member] | Communications Equipment [Member] | Electronics Assembler [Member] | Senior Secured Trade Finance Participations [Member]
Extended maturity date				Jun. 30, 2019
Entire principal amount									$ 1,749,000
Principal Amount	[2],[8]						$ 874,254	[28]		$ 6,029,026	[33]		$ 874,254	[28]	$ 6,029,026	[33]
Maturity	[2],[4],[8],[28]												Jun. 30, 2019
South Africa [Member] | Other Investments [Member] | Communications Equipment [Member] | Electronics Assembler [Member] | Senior Secured Trade Finance Participations [Member] | Minimum [Member]
Maturity	[2],[4],[8],[33]														Jan. 07, 2019
Interest	[2],[8]												12.00%	[28]	12.00%	[33]
South Africa [Member] | Other Investments [Member] | Communications Equipment [Member] | Electronics Assembler [Member] | Senior Secured Trade Finance Participations [Member] | Maximum [Member]
Maturity	[2],[4],[8],[33]														Feb. 14, 2019
Interest	[2],[8]												13.00%	[28]	13.00%	[33]

[1] In October 2017, this investment was refinanced from a trade finance participation to a term loan participation and the maturity dates were extended to 8/31/2022.

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

[3] In October 2017, this investment was refinanced from a trade finance to a term loan and the maturity dates were extended to 08/31/2022.

[4] 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.

[5] Investment classified as short term due to the funds being held in an escrow account pending the completion of the loan document. Funds accrue interest at 13% plus three-month Libor. Funds were fully disbursed out of escrow during the first quarter 2019.

[6] 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.

[7] During the fourth quarter 2018, the maturity dates of these investments were extended to 3/27/2019. The Company has further extended the maturity dates of these investments during the third quarter of 2019 to 8/31/2019.

[8] Principal and interest paid at maturity.

[9] During the fourth quarter 2018, the maturity dates of these investments were extended to 3/27/2019.

[10] During the first quarter 2019, a portion of this investment in the amount of $147,679 that had a maturity date in December 2018 was repaid in full.

[11] Quarterly payments of principal and interest in the amount of $2,143,500 are due starting on 2/15/2020.

[12] 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.

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

[14] One third of the principal and accrued interest to be paid on the 24th, 30th, and 42nd months after original drawdown date of 8/10/2017.

[15] One third of the principal and accrued interest to be paid on the 18th, 30th, and 42nd months after original drawdown date of 8/10/2017.

[16] 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 $173,300.

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

[18] 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.

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

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

[21] The maturity dates of these investments were previously extended to 1/2/2019 to 2/14/2019. During the first quarter 2019, they were further extended to 12/28/2019 to 2/9/2020.

[22] The maturity dates of these investments were previously extended to 1/2/2019 to 2/14/2019. During the first quarter 2019, they were further extended to December 2019 to February 2020.

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

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

[25] During the second quarter of 2019, the maturity dates of these investments were extended to 7/9/2019. The sub-advisor and the borrower are in discussions regarding principal repayment and a conclusion is expected in the following quarter.

[26] During the first quarter 2019, the maturity dates of these investments were extended to 4/10/2019 and 5/3/2019.

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

[28] This investment was repaid in full in July 2019.

[29] $2 million of this investment was repaid during the first quarter 2019. The maturity date of the remaining $2 million principal balance was extended to 7/31/2019.

[30] Cash interest paid monthly. Principal, including PIK interest, to be repaid in equal monthly installments starting in October 2020.

[31] Interest includes a stated coupon rate plus additional contingent interest payments based on a percentage of EBITDA after a minimum threshold has been achieved by the borrower.

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

[33] Partial payment of principal in the amount of approximately $1,749,000 was received during the first quarter of 2019. On April 1, 2019, the Company extended the maturity date to 6/30/2019.