Note 7 - Fair Value of Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	(Level 1)		(Level 2)		(Level 3)		(Excluded) (a)		Total at Fair Value
December 31, 2019
Alluvial Fund, LP	$	—	$	—	$	—	$	10,072,358	$	10,072,358
Total investments	$	—	$	—	$	—	$	10,072,358	$	10,072,358

	(Level 1)		(Level 2)		(Level 3)		(Excluded) (a)		Total at Fair Value
December 31, 2018
Alluvial Fund, LP	$	—	$	—	$	—	$	8,446,488	$	8,446,488
Huckleberry Real Estate Fund II, LLC		—		—		468,750		—		468,750
Total investments	$	—	$	—	$	468,750	$	8,446,488	$	8,915,238

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Year ended December 31, 2019			Year ended December 31, 2018
Huckleberry Real Estate Fund II, LLC
Beginning investment balance	$	468,750		$	750,000
Realized gain		212,631			—
Redemptions received		(681,381	)		(281,250	)
Ending investment balance	$	—		$	468,750