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Goodwill and Intangible Assets - Summary of Goodwill Activity (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016
Goodwill [Line Items]
Beginning balance		$ 1,676,000
Increases/(decreases)		0
GreenHaven acquisition		1,799,000
Goodwill impairment - Boost	$ 0	(1,676,000)
Ending balance	1,799,000	1,799,000
Reportable Subsegments [Member] | U.S. Business segment [Member]
Goodwill [Line Items]
Increases/(decreases)		0
GreenHaven acquisition		1,799,000
Ending balance	$ 1,799,000	1,799,000
Reportable Subsegments [Member] | International Business Segment [Member]
Goodwill [Line Items]
Beginning balance		1,676,000
Increases/(decreases)		0
Goodwill impairment - Boost		$ (1,676,000)

X

- Definition

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.

+ References

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-Publisher FASB
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+ References

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+ References

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