Note 2 - Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, shares in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Sep. 30, 2022	Jun. 11, 2014
Interest Income, Operating, Paid in Kind		$ 19,595,008		$ 19,832,878
Liability for Uncertainty in Income Taxes, Current		0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total		$ 0
Open Tax Year		2019 2020 2021 2022
Distribution, Dealer Manager and Service Fees Payable		$ 420,000		$ 446,000
Net Asset Value Per Share (in dollars per share)		$ 5.92	[1],[2]	$ 7.19	[1],[2]		$ 6.838
Investment Company, Net Asset Value Per Share, Period Increase (Decrease) (in dollars per share)	[2]	$ (1.18)		$ (0.39)
Unrealized Gain (Loss) on Investments		$ (34,855,545)		$ (13,643,894)
Weighted Average Number of Shares Outstanding, Diluted, Adjustment, Total (in shares)		0		0
Number of Watch List Investments		22
Investment Owned, at Fair Value		$ 273,616,782		$ 301,603,725
Investment Concentration [Member] | Investment Portfolio [Member]
Number of Investment Loans		5
Largest Loan by Value [Member]
Investment Owned, at Fair Value		$ 38,841,010
Largest Loan by Value [Member] | Investment Concentration [Member] | Investment Portfolio [Member]
Concentration Risk, Percentage		14.20%
Five Largest Loans by Value [Member] | Investment Concentration [Member] | Investment Portfolio [Member]
Concentration Risk, Percentage		40.30%
Participation in Loans [Member] | Investment Concentration [Member] | Investment Portfolio [Member]
Concentration Risk, Percentage		55.30%
International Investment Group LLC [Member] | Sub Advisory Agreement [Member]
Number of Watch List Investments		5
Non Existence Loan Participation Amount		$ 6,000,000
TriLinc Global LLC [Member]
Reimbursable Offering Costs, Maximum Percentage of Gross Offering Proceeds		15.00%
Approximate [Member]
Net Asset Value Per Share (in dollars per share)		$ 5.91
Capital Unit, Class C [Member]
Distribution Fee, Per Annum, Percentage of Estimated Value Per Share		0.80%
Selling Compensation, Percentage of Gross Proceeds From Offering		10.00%
Distribution Fee Payable		$ 402,000
Capital Unit Class I and Capital Unit Class W [Member]
Dealer Manager Fee Payable, Period, Maximum (Year)		5 years
Service Fee Payable, Period, Maximum (Year)		6 years
Capital Unit, Class I [Member]
Dealer Management Fee Payable		$ 17,000
Capital Unit, Class W [Member]
Dealer Manager and Service Fees Payable		1,000
Capital Unit Class C, Capital Unit Class I and Capital Unit Class W [Member]
Distribution, Dealer Manager and Service Fees Payable		$ 420,000
Class A, Class C, Class I, Class W, Class Y and Class Z Units [Member]
Net Asset Value Per Share (in dollars per share)		$ 5.927		$ 7.123		$ 6.838
Investment Company, Net Asset Value Per Share, Period Increase (Decrease) (in dollars per share)		(1.20)
Class A, Class C, Class I, Class W, Class Y and Class Z Units [Member] | Approximate [Member]
Net Asset Value Per Share (in dollars per share)		$ 5.92		$ 7.12
Each Subsidiary [Member]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest		100.00%

[1] For financial statement reporting purposes under GAAP, as of December 31, 2022 and 2021, the Company recorded a liability in the amount of $420,000 and $446,000, respectively, for the estimated future amount of Class C distribution fees, Class I dealer manager fees, Class W dealer manager fees and Class W services fees payable. This liability is reflected in this table, which is consistent with the financial statements. While the Company follows GAAP for financial reporting purposes, it has determined that deducting the accrual for the estimated future amount of Class C distribution fees, Class I dealer manager fees, Class W dealer manager fees and Class W services fees may not be the appropriate approach for determining the net asset value used on the quarterly investor statements and for other purposes. The Company believes that not making such deduction for purposes of net asset value determination is consistent with the industry standard and is more appropriate since the Company intends for the net asset value to reflect the estimated value on the date that the Company determines its net asset value.

[2] The per unit data was derived by using the weighted average units outstanding during the years ended December 31, 2022 and 2021, which were 47,725,051 and 47,102,346, respectively.