Stock-Based Compensation (Detail 1)	12 Months Ended
Dec. 31, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Options, Shares \| shares	369,887
Outstanding Options, Weighted- Average Remaining Contractual Term	9 years 1 month 6 days
Weighted Average- Exercise Price	$ 4.64
Exercisable Options, Shares \| shares	51,555
Exercisable Options, Weighted- Average Exercise Price	$ 14.12
Range of Exercise Prices - Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Per Share	$ 3.10
Outstanding Options, Shares \| shares	339,946
Outstanding Options, Weighted- Average Remaining Contractual Term	9 years 9 months 18 days
Weighted Average- Exercise Price	$ 3.10
Exercisable Options, Shares \| shares	21,614
Exercisable Options, Weighted- Average Exercise Price	$ 3.10
Range of Exercise Prices - Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Per Share	$ 5.60
Outstanding Options, Shares \| shares	2,500
Outstanding Options, Weighted- Average Remaining Contractual Term	1 year 3 months 29 days
Weighted Average- Exercise Price	$ 5.60
Exercisable Options, Shares \| shares	2,500
Exercisable Options, Weighted- Average Exercise Price	$ 5.60
Range of Exercise Prices - Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Per Share	$ 6.90
Outstanding Options, Shares \| shares	625
Outstanding Options, Weighted- Average Remaining Contractual Term	4 days
Weighted Average- Exercise Price	$ 6.90
Exercisable Options, Shares \| shares	625
Exercisable Options, Weighted- Average Exercise Price	$ 6.90
Range of Exercise Prices - Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Per Share	$ 11.40
Outstanding Options, Shares \| shares	17,804
Outstanding Options, Weighted- Average Remaining Contractual Term	1 year 3 months 25 days
Weighted Average- Exercise Price	$ 11.40
Exercisable Options, Shares \| shares	17,804
Exercisable Options, Weighted- Average Exercise Price	$ 11.40
Range of Exercise Prices - Range 5 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Per Share	$ 22.70
Outstanding Options, Shares \| shares	442
Outstanding Options, Weighted- Average Remaining Contractual Term	4 days
Weighted Average- Exercise Price	$ 22.70
Exercisable Options, Shares \| shares	442
Exercisable Options, Weighted- Average Exercise Price	$ 22.70
Range Of Exercise Prices - Range 6 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Per Share	$ 30.40
Outstanding Options, Shares \| shares	7,070
Outstanding Options, Weighted- Average Remaining Contractual Term	1 year 3 months 29 days
Weighted Average- Exercise Price	$ 30.40
Exercisable Options, Shares \| shares	7,070
Exercisable Options, Weighted- Average Exercise Price	$ 30.40
Range Of Exercise Prices - Range 7 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Per Share	$ 143.00
Outstanding Options, Shares \| shares	1,500
Outstanding Options, Weighted- Average Remaining Contractual Term	5 months 12 days
Weighted Average- Exercise Price	$ 143.00
Exercisable Options, Shares \| shares	1,500
Exercisable Options, Weighted- Average Exercise Price	$ 143.00

Exercise price per share or per unit of warrants or rights outstanding.

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)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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