Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)		12 Months Ended
	Sep. 07, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning Balance		$ 47,396,000	$ 41,871,000
Ending Balance		48,678,000	47,396,000	$ 41,871,000
Goodwill, Impairment Loss		$ 0	0	$ 0
Gigmasters
Goodwill [Roll Forward]
Goodwill, Acquisitions			$ 5,525,000
How He Asked
Goodwill [Roll Forward]
Goodwill, Acquisitions	$ 1,282,000
Ending Balance	$ 1,282,000