Note 8 - Equity Method Investments - Summary of Equity Method Investments (Details) - USD ($)		3 Months Ended			6 Months Ended		9 Months Ended
		Sep. 30, 2022		Sep. 30, 2021	Jun. 30, 2022		Sep. 30, 2021	Aug. 08, 2022	Jul. 01, 2022		Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	May 29, 2015
Investment Basis		$ 141,373,000			$ 0				$ 143,264,000
Real estate assets		261,079,000
Cash and cash equivalents		29,211,000			4,044,000				16,136,000		$ 2,238,000
Other assets											277,000
TOTAL ASSETS		1,254,878,000			1,137,656,000				1,306,297,000		1,048,014,000
Total Liabilities		207,821,000			24,788,000				193,429,000		53,554,000
Redeemable noncontrolling interests in the OP					83,252	[1]			0	[1]	83,252,000
Net assets		1,047,057,000		$ 835,096,000	1,029,616,000		$ 835,096,000		1,112,868,000		$ 911,208,000	$ 791,423,000	$ 790,825,000
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY		1,254,878,000			1,137,656,000				$ 1,306,297,000
Rental income		4,603,000
Net interest income		36,142,000		284,000	67,404,000		(1,048,000)
Other income		18,000
Total revenues		40,763,000
Total expenses		12,720,000		$ 4,988,000	$ 11,792,000		$ 14,185,000
NexPoint Real Estate Finance Operating Partnership, LP (NREF OP) [Member]
Investments		8,170,243,000
Real estate assets		59,940,000
Cash and cash equivalents		22,100,000
Other assets		23,661,000
TOTAL ASSETS		8,275,944,000
Debt		7,758,491,000
Other liabilities		22,361,000
Total Liabilities		7,780,852,000
Redeemable noncontrolling interests in the OP		143,165,000
Net assets		351,927,000
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY		8,275,944,000
Rental income		0
Net interest income		5,779,000
Other income		0
Total revenues		5,779,000
Total expenses		3,611,000
Gain/(loss) on sales of real estate		0
Other income/(expense)		(10,841,000)
Unrealized gain/(loss) on derivatives		0
Total comprehensive gain/(loss)		(8,673,000)
VineBrook Homes Trust Operating Partnership, OP (VB OP) [Member]
Investments		2,500,000
Real estate assets		3,463,082,000
Cash and cash equivalents		92,566,000
Other assets		193,309,000
TOTAL ASSETS		3,751,457,000
Debt		2,451,375,000
Other liabilities		155,141,000
Total Liabilities		2,606,516,000
Redeemable noncontrolling interests in the OP		348,040,000
Net assets		796,901,000
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY		3,751,457,000
Rental income		71,594,000
Net interest income		0
Other income		2,044,000
Total revenues		73,638,000
Total expenses		88,119,000
Gain/(loss) on sales of real estate		(224,000)
Other income/(expense)		84,000
Unrealized gain/(loss) on derivatives		29,356,000
Total comprehensive gain/(loss)		14,735,000
NexPoint Storage Partners, Inc [Member]
Investments		0
Real estate assets		763,318,000
Cash and cash equivalents		72,167,000
Other assets		150,746,000
TOTAL ASSETS		986,231,000
Debt		907,278,000
Other liabilities		26,696,000
Total Liabilities		933,974,000
Redeemable noncontrolling interests in the OP		0
Net assets		52,257,000
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY		986,231,000
Rental income		52,697,000
Net interest income		4,169,000
Other income		2,904,000
Total revenues		59,770,000
Total expenses		52,242,000
Gain/(loss) on sales of real estate		27,220,000
Other income/(expense)		(52,594,000)
Unrealized gain/(loss) on derivatives		0
Total comprehensive gain/(loss)		$ (17,846,000)
Sandstone Pasadena Apartments, LLC [MEmber]
Percentage Ownership		50.00%	[2]											83.30%
Investment Basis		$ 13,229,000
Percentage share of investee's net assets	[3]	0
Basis Difference		$ 13,229,000
Percentage Ownership		50.00%	[2]											83.30%
SAFStor NREA JV-I, LLC [Member]
Percentage Ownership	[2]	81.30%
Investment Basis		$ 57,152,000
Percentage share of investee's net assets	[3]	16,747,000
Basis Difference		$ 40,405,000
Properties beneficially owned		7
Storage units beneficially owned		5,417
Percentage Ownership	[2]	81.30%
SAFStor NREA JV-III, LLC [Member]
Percentage Ownership	[2]	73.60%
Investment Basis		$ 13,127,000
Percentage share of investee's net assets	[3]	3,023,000
Basis Difference		$ 10,104,000
Properties beneficially owned		1
Storage units beneficially owned		851
Percentage Ownership	[2]	73.60%
SAFStor Ventures [Member]
Investment Basis		$ 70,279,000
Properties beneficially owned		8
Storage units beneficially owned		6,268
AM Uptown Hotel, LLC [Member]
Percentage Ownership		60.00%									85.00%
Investment Basis		$ 28,015,000
Percentage share of investee's net assets	[3]	21,334,000
Basis Difference		$ 6,681,000
Percentage Ownership		60.00%									85.00%
SFR WLIF III, LLC [Member]
Percentage Ownership		20.00%
Investment Basis		$ 7,254,000
Percentage share of investee's net assets	[3]	7,466,000
Basis Difference		$ (212,000)
Percentage Ownership		20.00%
Las Vegas Land Owner, LLC [Member]
Percentage Ownership		77.00%	[4]					77.00%
Investment Basis		$ 12,312,000
Percentage share of investee's net assets	[3]	12,312,000
Basis Difference		$ 0
Percentage Ownership		77.00%	[4]					77.00%
Perilune Aero Equity Holdings One, LLC [Member]
Percentage Ownership		16.40%
Investment Basis		$ 10,284,000
Percentage share of investee's net assets	[3]	8,751,000
Basis Difference		$ 1,533,000
Percentage Ownership		16.40%
Claymore Holdings, LLC [Member]
Percentage Ownership	[5]	50.00%
Investment Basis	[6]	$ 0
Percentage share of investee's net assets	[3]	0
Basis Difference		$ 0
Percentage Ownership	[5]	50.00%
Allenby, LLC [Member]
Percentage Ownership	[5]	50.00%
Investment Basis	[6]	$ 0
Percentage share of investee's net assets	[3]	0
Basis Difference		$ 0
Percentage Ownership	[5]	50.00%
NexPoint Real Estate Finance Operating Partnership, LP (NREF OP) [Member]
Percentage Ownership		23.00%
Investment Basis	[6]	$ 104,397,000
Percentage share of investee's net assets	[3]	104,397,000
Basis Difference		$ 0
Percentage Ownership		23.00%
VineBrooke Homes Trust Operating Partnership, LP [Member]
Percentage Ownership	[7]	10.60%
Investment Basis	[6]	$ 169,473,000
Percentage share of investee's net assets	[3]	169,473,000
Basis Difference		$ 0
Percentage Ownership	[7]	10.60%
NexPoint Storage Partners, Inc [Member]
Percentage Ownership	[2]	53.00%
Investment Basis	[6]	$ 114,714,000
Percentage share of investee's net assets	[3]	114,714,000
Basis Difference		$ 0
Percentage Ownership	[2]	53.00%
NexPoint SFR Operating Partnership, LP [Member]
Percentage Ownership		28.40%
Investment Basis	[6]	$ 52,461,000
Percentage share of investee's net assets	[3]	52,461,000
Basis Difference		$ 0
Percentage Ownership		28.40%
NexPoint Hospitality Trust, Inc [Member]
Percentage Ownership		46.20%
Investment Basis	[6]	$ 27,074,000
Percentage share of investee's net assets	[3]	27,074,000
Basis Difference		$ 0
Percentage Ownership		46.20%
LLV Holdco, LLC [Member]
Percentage Ownership		26.80%
Investment Basis	[6]	$ 4,333,000
Percentage share of investee's net assets	[3]	4,333,000
Basis Difference		$ 0
Percentage Ownership		26.80%
Equity Method Investees [Member]
Investment Basis		$ 613,825,000
Percentage share of investee's net assets	[3]	542,085,000
Basis Difference		$ 71,740,000

[1] The mandatory redemption feature of the Series A Preferred Shares (defined below) expired on the Deregistration Date. As such, the Series A Preferred Shares are now accounted for as a component permanent equity.

[2] The Company owns greater than 50% of the outstanding common equity but is not deemed by the Company to be the primary beneficiary of the investee and as such, accounts for the investee using the equity method.

[3] Represents the Company’s percentage share of net assets of the investee per the investee’s books and records.

[4] The Company owns 100% of Las Vegas Land Owner, LLC which owns 77% of the Tivoli North Property as described below. Through the TIC, the Company shares control and as such accounts for this investment using the equity method.

[5] The Company has a 50% non-controlling interest in Claymore Holdings, LLC (“Claymore”) and Allenby, LLC, (“Allenby”). As such, the Company has determined it is not the primary beneficiary and does not consolidate these entities.

[6] The Company has elected the fair value option with respect to these investments. The basis in these investments is their September 30, 2022 fair market value.

[7] The Company owns less than 20% of the investee but has significant influence due to members of the management team serving on the board of the investee and as such, accounts for the investee using the equity method.