CAPITAL STOCK (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of weighted average valuation assumptions

	2021	2020	2019
Risk-free interest rate	0.98%	3.64%	1.62%
Expected lives	5.6 years	5.3 years	4.7 years
Expected volatility	47%	46%	40%
Expected dividend yield	0%	0%	0%

Schedule of stock options plans

A summary of our time vesting stock option activity is as follows:

	Year Ended December 31,
	2021
	Options	Weighted Average Exercise Price
Outstanding at beginning of period	464,232	$	57.18
Granted at market	19,500	$	188.62
Forfeited	(71)	$	98.66
Expired	—	$	—
Exercised	(63,459)	$	52.03
Outstanding at end of period	420,202	$	64.06
Exercisable at end of period	326,931	$	53.85

Schedule of shares authorized under stock options plans by exercise price range

The following table summarizes information about time vesting stock options outstanding and exercisable at December 31, 2021.

	Options Outstanding				Options Exercisable
Exercise Prices	Number of Options Outstanding at December 31, 2021	Weighted Average Remaining Contractual Life in Years	Weighted Average Exercise Price		Number of Options Exercisable at December 31, 2021	Weighted Average Remaining Contractual Life in Years	Weighted Average Exercise Price
$7.36 - $21.09	84,828	1.88	$	9.87	84,828	1.88	$	9.87
$21.10 - $69.76	98,288	6.82	$	53.06	63,288	6.01	$	48.71
$69.77 - $71.83	90,000	6.32	$	69.81	90,000	6.32	$	69.81
$71.84 - $95.65	96,131	6.91	$	80.90	70,362	6.58	$	79.10
$95.66 - $188.62	50,955	8.01	$	133.53	18,453	6.28	$	99.62
$7.36 - $188.62	420,202	5.88	$	64.06	326,931	5.16	$	53.85

	Options Outstanding				Options Exercisable
Exercise Prices	Number of Options Outstanding at December 31, 2021	Weighted Average Remaining Contractual Life in Years	Weighted Average Outstanding Price		Number of Options Exercisable at December 31, 2021	Weighted Average Remaining Contractual Life in Years	Weighted Average Exercise Price
$60.94	220,000	8.29	$	60.94	25,000	8.29	$	60.94
$198.40	34,800	4.44	$	198.40	—	—	$	—
$60.94 - $198.40	254,800	7.77	$	79.71	25,000	8.29	$	60.94

Schedule of restricted stock transactions

A summary of our performance-based stock option activity is as follows:

	Year Ended December 31,
	2021
	Options	Weighted Average Exercise Price
Outstanding at beginning of period	220,000	$	60.94
Granted at market	34,800	$	198.40
Outstanding at end of period	254,800	$	79.71
Exercisable at end of period	25,000	$	60.94

The following table summarizes restricted stock transactions for the year ended December 31, 2021:

	Restricted Stock Awards			Restricted Stock Units
	Restricted Stock	Weighted-Average Grant Date Fair Value Per Award		Restricted Stock	Weighted-Average Grant Date Fair Value Per Award
Non-vested as of December 31, 2020	291,520	$	78.44	—	$	—
Granted	243,369	$	207.24	6,000	$	172.11
Vested	(30,082)	$	68.33	—	$	—
Forfeited	(11,294)	$	104.49	—	$	—
Non-vested as of December 31, 2021	493,513	$	141.98	6,000	$	172.11