Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Property and equipment additions	$ 976	$ 423
Depreciation and amortization	2,196	2,771
Identifiable assets	445,257		$ 408,637
Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	197	50
Depreciation and amortization	1,221	1,580
Identifiable assets	254,238		254,752
Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	160	61
Depreciation and amortization	314	334
Identifiable assets	59,356		64,725
Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	419	152
Depreciation and amortization	614	738
Identifiable assets	71,253		71,572
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	200	160
Depreciation and amortization	47	$ 119
Identifiable assets	$ 60,410		$ 17,588