STOCK-BASED COMPENSATION Outstanding Stock Options (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding (in shares)	1,895,742	2,332,889
Options Outstanding, Intrinsic value	$ 2,043,623
Options Vested (in shares)	1,796,656
Options vested, Intrinsic Value	$ 2,043,623
$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)	285,450
Options Outstanding, Intrinsic value	$ 1,299,723
Options Vested (in shares)	285,450
Options vested, Intrinsic Value	$ 1,299,723
Weighted Average Remaining Life	3 years 1 month 6 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)	218,011
Options Outstanding, Intrinsic value	$ 546,573
Options Vested (in shares)	218,011
Options vested, Intrinsic Value	$ 546,573
Weighted Average Remaining Life	5 years 7 months
$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	$ 134,694
Options Vested (in shares)	68,500
Options vested, Intrinsic Value	$ 134,694
Weighted Average Remaining Life	5 years 4 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)	145,263
Options Outstanding, Intrinsic value	$ 62,633
Options Vested (in shares)	145,263
Options vested, Intrinsic Value	$ 62,633
Weighted Average Remaining Life	4 years 6 months 11 days
$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)	204,025
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	203,575
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	5 years 9 months 14 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)	320,299
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	317,738
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	6 years 2 months 23 days
$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)	104,000
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	98,803
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	6 years 7 months 20 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)	184,174
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	184,174
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	4 years 9 months 18 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)	366,020
Options Outstanding, Intrinsic value	$ 0
Options Vested (in shares)	275,142
Options vested, Intrinsic Value	$ 0
Weighted Average Remaining Life	7 years 7 months 6 days