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STOCK-BASED COMPENSATION (Details)		1 Months Ended	9 Months Ended	12 Months Ended
	Dec. 04, 2013	Apr. 30, 2015 shares	Sep. 30, 2015 shares	Dec. 31, 2014 shares	Jul. 31, 2014 shares	Dec. 31, 2013 shares	Dec. 31, 2012 shares
Stock-based compensation
Shares of common stock authorized for issuance outstanding (in shares)			1,356,246	281,029
Performance adjustment ratio		0.144927536
Stock options
Stock-based compensation
Shares of common stock authorized for issuance outstanding (in shares)				281,029		229,791	323,488
Vesting period			4 years	4 years
Contractual life			10 years	10 years
Performance adjustment ratio	0.5
Stock options | Minimum
Stock-based compensation
Period following termination date vested options are exercisable			1 month	1 month
Stock options | Maximum
Stock-based compensation
Period following termination date vested options are exercisable			3 months	3 months
2014 Stock Incentive Plan
Stock-based compensation
Shares of common stock authorized for issuance (in shares)		2,700,000			525,700
Shares of common stock authorized for issuance outstanding (in shares)				281,029

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Period after the date the vested equity-based award expires during which an employee continues to have the right to exercise an award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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