Consolidated Schedule of Investments (Parenthetical)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Payment
Amortized Cost	$ 203,854,890	$ 101,346,528
Corporacion Prodesa S.R.L. [Member] | Inventory Facility [Member]
Maturity	Feb. 15, 2015
Extended maturity date	Jul. 28, 2021
Nigeria [Member] | Helios Maritime I Ltd. [Member] | Water Transportation [Member] | Marine Logistics Provider [Member]
Variable interest rate		4.68%
Deferred interest rate included in investment interest accruing	4.68%
Nigeria [Member] | Helios Maritime I Ltd. [Member] | Water Transportation [Member] | Marine Logistics Provider [Member] | One-Month Libor [Member]
Variable interest rate	10.50%
Deferred interest rate included in investment interest accruing		10.50%
South Africa [Member] | Other Investments [Member] | Food Products [Member] | Fruit & Nut Distributor [Member]
Amortized Cost	$ 152,923
Zambia [Member] | Other Investments [Member] | Fertilizer & Agricultural Chemicals [Member] | Farm Supplies Distributor [Member]
Amortized Cost	$ 4,100,000
Maturity	Oct. 25, 2015
Peru [Member] | Corporacion Prodesa S.R.L. [Member] | Consumer Products [Member] | Diaper Manufacturer [Member]
Deferred interest rate included in investment interest accruing		2.50%
Peru [Member] | Corporacion Prodesa S.R.L. [Member] | Consumer Products [Member] | Diaper Manufacturer [Member] | Warrant Facility [Member]
Amortized Cost	$ 750,000
Maturity	Feb. 15, 2015
Extended maturity date	Dec. 22, 2016
Peru [Member] | Corporacion Prodesa S.R.L. [Member] | Consumer Products [Member] | Diaper Manufacturer [Member] | Inventory Facility [Member]
Amortized Cost	$ 1,750,000
Maturity	Sep. 30, 2016
Extended maturity date	Dec. 31, 2020
Peru [Member] | Pure Biofuels del Peru S.A.C. [Member] | Bulk Fuel Stations and Terminals [Member] | Clean Diesel Distributor [Member]
Entire principal amount	$ 18,462,024
Brazil [Member] | Usivale Industria E Commercio [Member] | Agricultural Products [Member] | Sugar Producer [Member]
Maturity	May 15, 2017
Extended maturity date	Feb. 28, 2021
Penalty interest accruing		5.00%
Number of missing interest payments | Payment		8
Argentina [Member] | Other Investments [Member] | Consumer Products [Member] | Dairy Co Operative
Maturity	Oct. 27, 2016
Extended maturity date	Jul. 29, 2017