CAPITAL STOCK (Tables)

6 Months Ended

Jun. 30, 2015

Notes to Financial Statements

Fair Value of each Option Grant

	Three Months Ended June 30, 2015		Six Months Ended June 30,
	2014	2015	2014	2015
Risk-free interest rate	1.10%	1.17%	1.07%	1.16%
Expected lives	3.3 years	3.4 years	3.3 years	3.4 years
Expected volatility	45%	43%	45%	43%
Expected dividend yield	0%	0%	0%	0%

Summary of Company Stock Option Plans

		Year Ended December 31, 2014					Six Months Ended June 30, 2015
		Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price
Outstanding at beginning of period			1,321,232		$	10.386		1,074,251		$	10.111
	Granted at market		134,800		$	16.398		29,046		$	27.650
	Cancelled		(218,926	)	$	17.786		(27,585	)	$	10.067
	Exercised		(162,855	)	$	7.234		(128,721	)	$	8.816
Outstanding at end of period			1,074,251		$	10.110		946,991		$	10.826
Exercisable at end of period			729,175		$	9.800		680,767		$	10.688

Stock Options Outstanding and Exercisable

	Options Outstanding						Options Exercisable
Exercise Prices	Number of Options Outstanding at June 30, 2015		Weighted Average Remaining Contractual Life in Years		Weighted Average Exercise Price		Number of Options Exercisable at June 30, 2015		Weighted Average Exercise Price
$  4.40 - $  6.90		226,753		5.40	$	5.597		213,505		$	5.529
$  6.91 - $  8.34		209,299		8.32	$	7.476		93,264		$	7.585
$  8.35 - $12.40		176,019		7.18	$	9.445		127,538		$	9.735
$12.41 -$17.17		147,561		1.10	$	13.752		143,487		$	13.718
$17.18 - $28.55		187,359		7.08	$	19.890		102,973		$	21.151
$  4.40 - $28.55		946,991		6.04	$	10.826		680,767		$	10.688

Employee Stock Purchase Plan

	Three Months Ended June 30		Six Months Ended June 30
	2014	2015	2014	2015
Risk-free interest rate	0.23%	0.24%	0.23%	0.24%
Expected lives	1.3 years	1.2 years	1.3 years	1.2 years
Expected volatility	35%	36%	34%	35%
Expected dividend yield	0%	0%	0%	0%