STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of stock-based compensation expense

For the three months ended March 31, 2020 and 2019, stock-based compensation expense was reflected in the accompanying Consolidated Statements of Operations as follows: 

	Three Months Ended March 31,
	2020			2019
Patient care costs	$	212		$	184
General and administrative	2,511			1,217
Total stock-based compensation before tax	$	2,723		$	1,401
Income tax benefit	$	(697	)	$	(364	)

Schedule of aaumptions used for options granted to acquire Common Stock and the fair value at the date of grant

The assumptions used for options granted to acquire common stock during 2020 and the fair value at the date of grant under the 2016 Plan are noted in the following table:

	Three Months Ended March 31, 2020
Expected Volatility	50%
Weighted average expected terms in years	6.0
Weighted average risk-free interest rate	0.935%
Expected annual dividend yield	—%
Weighted average grant-date fair value	$3.60

Schedule of information concerning options activity for options to acquire Common Stock

Information concerning options activity for options under all option plans to acquire common stock is summarized as follows:

	Three Months Ended March 31, 2020
	Number of options		Weighted-average exercise price
Options outstanding as of January 1, 2020	4,803,146		$	12.29
Granted	96,765		7.58
Exercised	(44,225	)	3.50
Forfeited/Canceled	(62,710	)	16.27
Options outstanding as of March 31, 2020	4,792,976		$	12.22
Vested and expected to vest as of March 31, 2020	4,792,976		$	12.22
Exercisable as of March 31, 2020	3,272,342		$	9.70

Schedule of restricted stock award activity

A summary of restricted stock award activity is as follows: 

	Three Months Ended March 31, 2020
	Number of shares		Weighted-average grant date fair value per award
Unvested as of January 1, 2020	579,283		$	15.01
Granted	824,336		7.58
Vested	(223,196	)	14.52
Forfeited/Canceled	(53,654	)	18.37
Unvested as of March 31, 2020	1,126,769		$	9.08