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STOCK BASED COMPENSATION - Restricted Stock Units (Details) $ / shares in Units, $ in Thousands		6 Months Ended		12 Months Ended
	Feb. 24, 2015	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2015 shares	Dec. 31, 2015 USD ($) $ / shares shares	Apr. 01, 2016 shares
Restricted Stock Units
Stock spilt	2
Common stock dividend for each outstanding share (in shares)					0.25
Restricted Stock Units
Restricted Stock Units
Vesting period		5 years
Restricted Stock Units
Restricted stock units at the beginning of the period (in shares)		161,000
Awarded (in shares)
Released (in shares)		0	0
Forfeited (in shares)		(6,000)
Restricted stock units at the end of the period (in shares)		155,000		161,000
Weighted-Average Grant Date Fair Value
Restricted stock units at the beginning of the period (in dollars per share) | $ / shares		$ 3.16
Awarded (in dollars per share) | $ / shares
Forfeited (in dollars per share) | $ / shares		6.00
Restricted stock units at the end of the period (in dollars per share) | $ / shares		$ 3.05		$ 3.16
Weighted Average Remaining Contractual Life
Restricted stock units		2 years 8 months 19 days		3 years 3 months 18 days
Aggregate Intrinsic Value
Restricted stock units | $		$ 1,826		$ 921
Stock price | $ / shares		$ 11.78		$ 5.71
Restricted Stock Units | First installment
Restricted Stock Units
Vesting (as a percent)		50.00%
Restricted Stock Units | Second installment
Restricted Stock Units
Vesting (as a percent)		50.00%

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Number of shares of common stock issued as a dividend for each share issued and outstanding as of a certain date.

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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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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Price of a single share of a number of saleable stocks of a company.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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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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