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Derivative Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Apr. 13, 2014	Oct. 11, 2013	May 10, 2012	Nov. 08, 2011	Apr. 08, 2011	Oct. 11, 2010
Derivative [Line Items]
Warrants issued to acquire common shares					260,417	108,507		150,000
Warrants exercisable date	Apr. 13, 2014
Linked common shares	130,208	130,208
Shares available for issuance upon exercise					36,169	36,169
Face amount of new loans					$ 8,000,000
Warrants Attached to Series G Preferred Stock [Member]
Derivative [Line Items]
Warrants issued to acquire common shares							43,750
Warrants Attached to Senior Convertible Debt [Member]
Derivative [Line Items]
Warrants issued to acquire common shares						108,507
Common Stock [Member]
Derivative [Line Items]
Linked common shares			525,000
Common Stock [Member] | Level 3 [Member]
Derivative [Line Items]
Linked common shares				1,725,000
Warrants exercisable date	Oct. 11, 2013

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+ References

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(3))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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