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Acquisitions - Additional Information (Detail) - USD ($) shares in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Nov. 30, 2018 | Mar. 31, 2019
Telmetrics Acquisition |  |
Business Acquisition [Line Items] |  |
Business acquisition, percentage of voting interests acquired | 100.00% |
Cash paid for business acquisition | $ 10,100,000 |
Maximum contingent consideration cash payable on acquisition | $ 3,000,000 |
Contingent consideration, description | Up to $3.0 million in cash based upon the achievement of targeted financial goals over the two (2) twelve (12) month periods following the acquisition date. |
Minimum contingent consideration cash payable on acquisition | $ 0 |
Business combination contingent consideration payment to employees | 450,000 |
Fair value of contingent consideration | $ 1,600,000 | $ 1,600,000
Indemnification obligations period | 18 months |
Identifiable intangible assets |  | $ 6,351,000
Weighted average useful life |  | 3 years 7 months 6 days
Finite-lived intangible assets, amortization method |  | straight-line method
Total consideration | $ 11,700,000 |
Telmetrics Acquisition | Minimum |  |
Business Acquisition [Line Items] |  |
Acquired identifiable intangible assets amortization period |  | 24 months
Telmetrics Acquisition | Maximum |  |
Business Acquisition [Line Items] |  |
Acquired identifiable intangible assets amortization period |  | 60 months
Callcap Acquisition |  |
Business Acquisition [Line Items] |  |
Business acquisition, percentage of voting interests acquired | 100.00% |
Cash paid for business acquisition | $ 24,993,000 |
Indemnification obligations period | 18 months |
Identifiable intangible assets |  | $ 15,128,000
Weighted average useful life |  | 4 years 1 month 6 days
Finite-lived intangible assets, amortization method |  | straight-line method
Total consideration | $ 35,010,000 |
Callcap Acquisition | Class B |  |
Business Acquisition [Line Items] |  |
Stock issued during the period, shares | 3.4 |
Stock issued during the period, value | $ 10,000,000 |
Common stock issuance period | 4 years |
Callcap Acquisition | Minimum |  |
Business Acquisition [Line Items] |  |
Acquired identifiable intangible assets amortization period |  | 24 months
Callcap Acquisition | Maximum |  |
Business Acquisition [Line Items] |  |
Acquired identifiable intangible assets amortization period |  | 60 months

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