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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Short-term investment maturity period				3 months
Restricted cash		$ 10,010		$ 10,010		$ 10,000
Capitalized cost of assets held for sale		$ 416,329		$ 416,329
Decrease in indebtedness	$ 650,000
Weighted average number of common shares outstanding		8,388,821	7,558,835	8,145,689	7,548,136
Redeemable preferred stock outstanding		0		0
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, estimated useful life				3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, estimated useful life				30 years

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 13
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