Note 16 - Segment Reporting - Segment Reporting (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2025
Revenue from Contract with Customer, Including Assessed Tax		$ 34,057	$ 36,838	$ 36,838
Direct materials		16,379		19,391
Direct labor		3,485		5,023
Indirect labor		4,010		4,487
Variable overhead		1,831		1,348
AMP credits		(2,571)		(2,564)
Salaries and benefits		679		398
Share-based compensation		127		146
Depreciation and amortization		1,479	1,702	1,702
All other expenses (1)	[1]	8,249		6,723
Operating income (loss)		389	184	184
Capital expenditures		2,778		916
Total assets		117,968			$ 116,805
External Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax		34,057		36,838
Operating Segments [Member] | Heavy Fabrications [Member]
Revenue from Contract with Customer, Including Assessed Tax		16,367	25,248	25,248
Direct materials		9,447		14,622
Direct labor		1,916		3,762
Indirect labor		2,053		2,811
AMP credits		(2,571)		(2,564)
Depreciation and amortization		837		1,021
All other expenses (1)	[1]	3,898		3,355
Operating income (loss)		787		2,241
Capital expenditures		1,792		861
Total assets		29,124			33,393
Operating Segments [Member] | Heavy Fabrications [Member] | External Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax		16,367		25,248
Operating Segments [Member] | Gearing [Member]
Revenue from Contract with Customer, Including Assessed Tax		8,454	5,966	5,966
Direct materials		2,010		1,440
Direct labor		1,569		1,261
Indirect labor		1,259		1,129
Variable overhead		1,017		875
AMP credits		0		0
Depreciation and amortization		530		549
All other expenses (1)	[1]	2,126		1,604
Operating income (loss)		(57)		(892)
Capital expenditures		946		26
Total assets		42,891			40,752
Operating Segments [Member] | Gearing [Member] | External Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax		8,454		5,966
Operating Segments [Member] | Industrial Solutions [Member]
Revenue from Contract with Customer, Including Assessed Tax		9,236	5,647	5,647
Direct materials		4,922		3,329
Indirect labor		698		547
Variable overhead		814		473
AMP credits		0		0
Depreciation and amortization		96		114
All other expenses (1)	[1]	1,080		854
Operating income (loss)		1,626		330
Capital expenditures		24		0
Total assets		23,128			20,222
Operating Segments [Member] | Industrial Solutions [Member] | External Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax		9,236		5,624
Operating Segments [Member] | Corporate Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax				0
Direct materials				0
Direct labor				0
Indirect labor				0
Variable overhead				0
AMP credits				0
Salaries and benefits				398
Share-based compensation				146
Depreciation and amortization				18
All other expenses (1)	[1]			933
Operating income (loss)				(1,495)
Capital expenditures				29
Total assets		44,345			44,668
Operating Segments [Member] | Corporate Segment [Member] | External Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax				0
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenue from Contract with Customer, Including Assessed Tax		0
Direct materials		0
Direct labor		0
Indirect labor		0
Variable overhead		0
AMP credits		0
Salaries and benefits		679
Share-based compensation		127
Depreciation and amortization		16
All other expenses (1)	[1]	1,145
Operating income (loss)		(1,967)
Capital expenditures		16
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | External Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax		0
Consolidation, Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	$ (23)	(23)
Direct labor		0		0
Indirect labor		0		0
Variable overhead		0		0
AMP credits		0		0
Salaries and benefits		0		0
Share-based compensation		0		0
Depreciation and amortization		0		0
All other expenses (1)	[1]	0		(23)
Operating income (loss)		0		0
Capital expenditures		0		0
Total assets		(21,520)			$ (22,230)
Consolidation, Eliminations [Member] | External Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax		0		0
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0		(23)
Intersegment Eliminations [Member] | Heavy Fabrications [Member]
Revenue from Contract with Customer, Including Assessed Tax		0		0
Intersegment Eliminations [Member] | Gearing [Member]
Revenue from Contract with Customer, Including Assessed Tax		0		0
Intersegment Eliminations [Member] | Industrial Solutions [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 0		23
Intersegment Eliminations [Member] | Corporate Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax				$ 0

[1] All other expenses for each reportable segment primarily consist of: Heavy Fabrications-variable overhead, salaries and benefits, and rent and utilities Gearing-salaries and benefits and rent Industrial Solutions-direct labor, salaries and benefits, and rent and utilities Corporate-professional expenses