Stock Option Plans (Tables)

12 Months Ended

Dec. 31, 2019

Text Block [Abstract]

Transaction under Stock Option Plan

Transactions under the 2012 Plan for the years ending December 31, 2019, 2018, and 2017 were as follows:

(in thousands, except share and per share data)	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding, December 31, 2016		3,465,335		$	5.07
Granted		688,800			5.27
Exercised		(180,000	)		3.67
Cancelled		(122,000	)		6.64
Outstanding, December 31, 2017		3,852,135			5.12
Granted		1,744,950			2.35
Exercised		(104,167	)		2.30
Cancelled		(215,833	)		5.72
Outstanding, December 31, 2018		5,277,085			4.24
Granted		2,880,691			3.40
Exercised		(581,105	)		3.30
Cancelled		(1,733,792	)		4.21
Outstanding, December 31, 2019		5,842,879		$	3.21		8.07	$	7,482
Options exercisable, December 31, 2019		2,765,357		$	4.39		6.70	$	3,603
Options exercisable, December 31, 2018		3,099,935		$	5.15		4.93	$	88
Options available for future grant at December 31, 2019		2,503,508

Summary of Non-Vested Restricted Stock

A summary of the status of restricted stock as of December 31, 2019, 2018 and 2017 is as follows:

	Number of Shares			Weighted-Average Grant Date Fair Value
Non-vested, December 31, 2016		1,680,492		$	7.49
Granted		907,032			4.14
Vested		(778,965	)		7.66
Cancelled		—			—
Non-vested, December 31, 2017		1,808,559			5.74
Granted		150,321			1.87
Vested		(1,005,377	)		6.62
Cancelled		(271,433	)		5.00
Non-vested, December 31, 2018		682,070			3.47
Granted		1,519,766			2.44
Vested		(1,187,601	)		2.82
Cancelled		(74,599	)		3.41
Non-vested, December 31, 2019		939,636		$	2.93