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Business Combinations - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Business Acquisition [Line Items]
Accounts receivable	$ 4,218	$ 1,796
Inventories	615	1,014
Other current assets	575
Property and equipment	949	1,224
Intangibles	6,926	10,122
Goodwill	4,733	10,402
Other non-current assets	74	161
Accounts payable and other current liabilities	(1,262)	(81)
Deferred income tax liabilities	(35)
Other long-term liabilities	(131)
Fair value of assets acquired and purchase price	16,662	24,638
Less fair value of common stock issued		3,348
Less seller obligations	4,037	3,348
Cash paid	12,625	21,290
Royals [Member]
Business Acquisition [Line Items]
Accounts receivable	2,848
Inventories	305
Other current assets	430
Property and equipment	598
Intangibles	3,930
Goodwill	3,015
Other non-current assets	58
Accounts payable and other current liabilities	(1,059)
Deferred income tax liabilities	(35)
Fair value of assets acquired and purchase price	10,090
Less seller obligations	2,500
Cash paid	7,590
First State Insulation [Member]
Business Acquisition [Line Items]
Inventories		291
Property and equipment		989
Intangibles		3,382
Goodwill		1,857
Accounts payable and other current liabilities		(39)
Fair value of assets acquired and purchase price		6,480
Less seller obligations		1,355
Cash paid		5,125
Other Acquisition [Member]
Business Acquisition [Line Items]
Accounts receivable	1,370
Inventories	310
Other current assets	145
Property and equipment	351
Intangibles	2,996
Goodwill	1,718
Other non-current assets	16
Accounts payable and other current liabilities	(203)
Other long-term liabilities	(131)
Fair value of assets acquired and purchase price	6,572
Less seller obligations	1,537
Cash paid	$ 5,035
Expert Insulation [Member]
Business Acquisition [Line Items]
Accounts receivable		1,796
Inventories		723
Property and equipment		235
Intangibles		6,740
Goodwill		8,545
Other non-current assets		161
Accounts payable and other current liabilities		(42)
Fair value of assets acquired and purchase price		18,158
Less seller obligations		1,993
Cash paid		$ 16,165

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