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.

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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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stock-based Compensation and Benefit Plans - Stock Options Outstanding and Exercisable (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock option, exercise price, Minimum	$ 5.70	$ 11.25	$ 5.70	$ 11.25
Stock option, exercise price, Maximum	$ 7.50	$ 22.50	$ 7.50	$ 22.50
Number Outstanding	290,380		290,380
Weighted Average Remaining Contractual Life			3 years 9 months 26 days
Weighted Average Price	$ 16.08		$ 16.08
Aggregate Intrinsic Value	$ 82,897		$ 82,897		$ 121,741
Number Exercisable	183,955		183,955
Weighted Average Price, Exercisable	$ 19.78		$ 19.78
Aggregate Intrinsic Value, Options Exercisable	$ 27,741		$ 27,741
Exercise Price Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock option, exercise price, Minimum			$ 5.70
Stock option, exercise price, Maximum			$ 9.30
Number Outstanding	85,584		85,584
Weighted Average Remaining Contractual Life			4 years 6 months
Weighted Average Price	$ 6.19		$ 6.19
Aggregate Intrinsic Value	$ 82,897		$ 82,897
Number Exercisable	29,274		29,274
Weighted Average Price, Exercisable	$ 6.20		$ 6.20
Aggregate Intrinsic Value, Options Exercisable	$ 27,741		$ 27,741
Exercise Price Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock option, exercise price, Minimum			$ 10.50
Stock option, exercise price, Maximum			$ 20.25
Number Outstanding	77,770		77,770
Weighted Average Remaining Contractual Life			4 years 18 days
Weighted Average Price	$ 12.72		$ 12.72
Aggregate Intrinsic Value
Number Exercisable	32,751		32,751
Weighted Average Price, Exercisable	$ 12.90		$ 12.90
Aggregate Intrinsic Value, Options Exercisable
Exercise Price Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock option, exercise price, Minimum			$ 22.50
Stock option, exercise price, Maximum			$ 60.00
Number Outstanding	127,026		127,026
Weighted Average Remaining Contractual Life			3 years 2 months 16 days
Weighted Average Price	$ 24.81		$ 24.81
Aggregate Intrinsic Value
Number Exercisable	121,930		121,930
Weighted Average Price, Exercisable	$ 24.89		$ 24.89
Aggregate Intrinsic Value, Options Exercisable