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Acquisitions - Additional Information (Detail) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 31, 2017 USD ($) | Jan. 16, 2015 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Nov. 05, 2014 USD ($)
Number Of Employees |  | 3 |  |  |  |
Business Acquisition Purchase Price Allocation Description |  | The purchase price for this acquisition was $2.4 million cash paid at closing and the assumption of a liability of $20,000, and a maximum of an additional $3.0 million of deferred acquisition cost, or earn-out. |  |  |  |
Tangible assets |  | $ 1,600,000 |  |  |  |
Intangible assets |  | 1,500,000 |  |  |  |
Goodwill |  | $ 2,300,000 |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  | $ 3,000,000 |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  |  | 1,000,000 |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Goodwill |  |  |  | 1,900,000 |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles |  |  |  | 800,000 |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory |  |  |  | 100,000 |  |
Business Combination Earnout Liability, cash paid |  |  | $ 1,700,000 | 400,000 |  |
Subsequent Event [Member] |  |  |  |  |  |
Business Combination Earnout Liability, cash paid | $ 800,000 |  |  |  |  |
Accrued Expenses and Other Current Liabilities [Member] |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Noncurrent |  |  |  | 1,900,000 |  |
Other Income (Expense) [Member] |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low |  |  |  | 300,000 |  |
Other Noncash Expense |  |  | $ 600,000 |  |  |
Minimum [Member] |  |  |  |  |  |
Intangible assets amotized period |  |  | 2 years |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total |  |  |  | 4,400,000 |  |
Maximum [Member] |  |  |  |  |  |
Intangible assets amotized period |  |  | 10 years |  |  |
Allocated Share Based Compensation Expense |  |  | $ 3,000,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total |  |  |  | 5,400,000 |  |
Polar Technologies [Member] |  |  |  |  |  |
Tangible assets |  |  |  | 200,000 | $ 5,400,000 |
Intangible assets |  |  |  | 300,000 | 2,300,000 |
Goodwill |  |  |  | $ 200,000 | $ 300,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total |  |  |  |  |  | $ 8,000,000
Polar Technologies [Member] | Minimum [Member] |  |  |  |  |  |
Intangible assets amotized period |  |  |  |  | 2 years |
Polar Technologies [Member] | Maximum [Member] |  |  |  |  |  |
Intangible assets amotized period |  |  |  |  | 10 years |

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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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