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Acquisitions - Additional Information (Detail) $ in Thousands |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 26, 2019 USD ($) Location shares | Aug. 01, 2019 USD ($) Location shares | Apr. 02, 2019 USD ($) Location shares | Aug. 23, 2018 USD ($) shares | Dec. 31, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Proceeds from non-controlling interest for Business Acquisition |  |  |  |  | $ 17,000
N&S Supply of Fishkill, Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of locations in which the company operates | Location | 7 |  |  |  |
Cash consideration | $ 12,000 |  |  |  |
Stock issued for acquisition | shares | 22,435 |  |  |  |
Fair value of equity shares issued | $ 3,871 |  |  |  |
Goodwill and intangibles acquired | 4,672 |  |  |  |
Intangible assets acquired | $ 1,540 |  |  |  |
Number of years goodwill is deductible for tax purposes | 15 years |  |  |  |
N&S Supply of Fishkill, Inc | Customer Relationships [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired | $ 770 |  |  |  |
Amortization period | 18 years |  |  |  |
N&S Supply of Fishkill, Inc | Trade Names And Distribution Rights [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired | $ 770 |  |  |  |
Peirce Phelps PPI [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of locations in which the company operates | Location |  | 19 |  |  |
Purchase price less certain average revolving indebtedness |  | $ 85,000 |  |  |
Cash consideration |  | $ 10,000 |  |  |
Stock issued for acquisition | shares |  | 372,543 |  |  |
Fair value of equity shares issued |  | $ 58,344 |  |  |
Proceeds from non-controlling interest for Business Acquisition |  | 17,000 |  |  |
Goodwill and intangibles acquired |  | 28,884 |  |  |
Intangible assets acquired |  | $ 19,000 |  |  |
Number of years goodwill is deductible for tax purposes |  | 15 years |  |  |
Peirce Phelps PPI [Member] | Customer Relationships [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired |  | $ 5,500 |  |  |
Amortization period |  | 18 years |  |  |
Peirce Phelps PPI [Member] | Trade Names And Distribution Rights [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired |  | $ 13,500 |  |  |
Dunphey Associates Supply Co [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of locations in which the company operates | Location |  |  | 7 |  |
Cash consideration |  |  | $ 16,758 |  |
Stock issued for acquisition | shares |  |  | 50,952 |  |
Fair value of equity shares issued |  |  | $ 6,891 |  |
Goodwill and intangibles acquired |  |  | 8,974 |  |
Intangible assets acquired |  |  | $ 5,300 |  |
Number of years goodwill is deductible for tax purposes |  |  | 15 years |  |
Dunphey Associates Supply Co [Member] | Customer Relationships [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired |  |  | $ 2,800 |  |
Amortization period |  |  | 15 years |  |
Dunphey Associates Supply Co [Member] | Trade Names And Distribution Rights [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired |  |  | $ 2,500 |  |
Alert Labs Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  |  |  | $ 5,889 |
Adjustment related to previously held equity interest |  |  |  | 171 |
Intangibles and goodwill acquired |  |  |  | 15,403 |
Fair value of intangible assets |  |  |  | 1,640 |
Alert Labs Inc | Patented And Unpatented Technology [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Fair value of intangible assets |  |  |  | $ 1,600 |
Alert Labs Inc | Customer Relationships [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Amortization period |  |  |  | 7 years |
Fair value of intangible assets |  |  |  | $ 40 |
Stock consideration [Member] | Alert Labs Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Fair value of equity shares issued |  |  |  | $ 3,991 |
Stock issued for acquisition | shares |  |  |  | 23,873 |
Contingent consideration [Member] | Alert Labs Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Stock issued for acquisition | shares |  |  |  | 23,230 |
Contingent consideration |  |  |  | $ 3,026 |
Contingent consideration performance measurement period |  |  |  | 3 years |

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