STOCK-BASED COMPENSATION Outstanding Stock Options (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding (in shares)	2,101,178	2,332,889
Options Outstanding, Intrinsic value	$ 394,078
Options Vested (in shares)	1,976,716
Options vested, Intrinsic Value	$ 394,078
$5.00 – $5.50
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 5.00
Exercise price, upper limit (in dollars per share)	$ 5.50
Options Outstanding (in shares)	316,450
Options Outstanding, Intrinsic value	$ 394,078
Options Vested (in shares)	316,450
Options vested, Intrinsic Value	$ 394,078
Weighted Average Remaining Life	3 years 4 months 13 days
$6.90 – $7.66
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 6.90
Exercise price, upper limit (in dollars per share)	$ 7.66
Options Outstanding (in shares)	235,698
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	235,698
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	5 years 9 months 29 days
$7.96 – $8.14
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 7.96
Exercise price, upper limit (in dollars per share)	$ 8.14
Options Outstanding (in shares)	68,500
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	68,500
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	5 years 7 months 13 days
$9.17 – $10.98
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 9.17
Exercise price, upper limit (in dollars per share)	$ 10.98
Options Outstanding (in shares)	171,513
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	171,513
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	5 years
$11.18 - $11.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 11.18
Exercise price, upper limit (in dollars per share)	$ 11.99
Options Outstanding (in shares)	215,625
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	215,175
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	6 years 22 days
$12.28 - $12.97
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 12.28
Exercise price, upper limit (in dollars per share)	$ 12.97
Options Outstanding (in shares)	341,048
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	338,175
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	6 years 6 months
$13.00 - $13.48
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 13.00
Exercise price, upper limit (in dollars per share)	$ 13.48
Options Outstanding (in shares)	149,650
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	129,459
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	6 years 10 months 28 days
$14.03 - $14.88
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 14.03
Exercise price, upper limit (in dollars per share)	$ 14.88
Options Outstanding (in shares)	206,674
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	204,727
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	5 years 7 days
$16.08 - $17.11
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit (in dollars per share)	$ 16.08
Exercise price, upper limit (in dollars per share)	$ 17.71
Options Outstanding (in shares)	396,020
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	297,019
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	7 years 10 months 6 days