For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, this item identifies a second characteristic of the concentration. For example, "Europe" is the second characteristic in the phrase: "net assets in Europe are 70% of total net assets".

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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SEGMENTS AND RELATED INFORMATION - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014
Segment Reporting Information [Line Items]
Number of reportable segments	2
Concentration Risk, Additional Characteristic		International sales, primarily to Canadian customers, accounted for less than 10% in each of the last three years.
Impairment of goodwill	$ 1,700	$ 1,663	$ 1,087
Sales Revenue, Net
Segment Reporting Information [Line Items]
Concentration Risk, Percentage		100.00%	100.00%	100.00%
Five Largest Customers \| Sales Revenue, Net
Segment Reporting Information [Line Items]
Concentration Risk, Percentage		24.00%	25.00%	20.00%
No Customers [Member] \| Sales Revenue, Net
Segment Reporting Information [Line Items]
Concentration Risk, Percentage		10.00%	10.00%	10.00%