Note 2 - Reportable Segments (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended June 30, 2024
(in thousands)	Land and Water Resources			Water Filtration Technology			Total
Revenues	$	350		$	163		$	513
Costs and expenses:
Cost of sales		679			173			852
General and administrative		5,917			388			6,305
Depreciation		292			13			305
Total costs and expenses		6,888			574			7,462
Operating loss	$	(6,538	)	$	(411	)	$	(6,949	)

	Three Months Ended June 30, 2023
(in thousands)	Land and Water Resources			Water Filtration Technology			Total
Revenues	$	379		$	430		$	809
Costs and expenses:
Cost of sales		432			336			768
General and administrative		5,232			88			5,320
Depreciation		271			34			305
Total costs and expenses		5,935			458			6,393
Operating loss	$	(5,556	)	$	(28	)	$	(5,584	)

	Six Months Ended June, 2024
(in thousands)	Land and Water Resources			Water Filtration Technology			Total
Revenues	$	986		$	648		$	1,634
Costs and expenses:
Cost of sales		1,339			517			1,856
General and administrative		10,397			638			11,035
Depreciation		574			26			600
Total costs and expenses		12,310			1,181			13,491
Operating loss	$	(11,324	)	$	(533	)	$	(11,857	)

	Six Months Ended June 30, 2023
(in thousands)	Land and Water Resources			Water Filtration Technology			Total
Revenues	$	509		$	430		$	939
Costs and expenses:
Cost of sales		454			336			790
General and administrative		8,999			252			9,251
Depreciation		549			85			634
Total costs and expenses		10,002			673			10,675
Operating loss	$	(9,493	)	$	(243	)	$	(9,736	)

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	June 30, 2024		December 31, 2023
Operating Segment:
Water and Land Resources	$	109,387	$	101,946
Water Filtration Technology		8,725		5,428
	$	118,112	$	107,374

Schedule of Goodwill [Table Text Block]

	June 30, 2024		December 31, 2023
Operating Segment:
Water and Land Resources	$	3,813	$	3,813
Water Filtration Technology		1,901		1,901
	$	5,714	$	5,714

Property, Plant and Equipment [Table Text Block]

	June 30, 2024
	Water and Land Resources			Water Filtration Technology
Land and land improvements	$	33,004		$	-
Water programs		29,321			-
Pipeline		22,098			-
Buildings		1,805			-
Leasehold improvements, furniture and fixtures		1,605			4
Machinery and equipment		3,826			247
Construction in progress		5,091			4
		96,750			255
Less accumulated depreciation		(9,811	)		(160	)
	$	86,939		$	95

	December 31, 2023
	Water and Land Resources			Water Filtration Technology
Land and land improvements	$	32,357		$	-
Water programs		29,209			-
Pipeline		22,096			-
Buildings		1,730			-
Leasehold improvements, furniture and fixtures		1,605			4
Machinery and equipment		3,719			210
Construction in progress		5,664			-
		96,380			214
Less accumulated depreciation		(9,238	)		(139	)
	$	87,142		$	75