STOCK-BASED COMPENSATION PLANS (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of stock-based compensation, net of estimated forfeitures

The following table summarizes the amount of stock-based compensation, net of estimated forfeitures, included in the consolidated statements of operations and comprehensive loss (in thousands): 

	Year Ended December 31,
	2018		2017		2016
Costs of customer support	$	165	$	167	$	1,159
Sales, general and administrative	4,513		2,873		3,838
	$	4,678	$	3,040	$	4,997

Schedule of stock option activity of stock-based compensation plans

Stock option activity during the year ended December 31, 2018 under all of our stock-based compensation plans was as follows (shares in thousands): 

	Shares		Weighted Average Exercise Price
Balance, December 31, 2017	379		$	21.17
Granted	—		—
Exercised	(6	)	8.49
Forfeitures and post-vesting cancellations	(150	)	14.55
Balance, December 31, 2018	223		25.95
Exercisable, December 31, 2018	211		26.74

Schedule of fully vested and exercisable stock options and stock options expected to vest

Fully vested and exercisable stock options and stock options expected to vest as of December 31, 2018 are further summarized as follows (shares in thousands): 

	Fully Vested and Exercisable		Expected to Vest
Total shares	211		223
Weighted-average exercise price	$	26.74	$	25.95
Aggregate intrinsic value	$	—	$	—
Weighted-average remaining contractual term (in years)	3.8		4.0

Schedule of restricted stock activity

Restricted stock activity during the year ended December 31, 2018 was as follows (shares in thousands): 

	Shares		Weighted- Average Grant Date Fair Value
Unvested balance, December 31, 2017	760		$	4.03
Granted	608		$	7.73
Vested	(277	)	$	6.95
Forfeited	(133	)	$	6.61
Unvested balance, December 31, 2018	958		$	5.17

Schedule of unrecognized compensation costs related to unvested stock-based compensation

Total unrecognized compensation costs related to unvested stock-based compensation as of December 31, 2018 is as follows (dollars in thousands): 

	Stock Options		Restricted Stock		Total
Unrecognized compensation	$	53	$	3,330	$	3,383
Weighted-average remaining recognition period (in years)	1.03		2.90		2.90