Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following is a summary of stock option activity: (in thousands, except exercise price data and contractual life data):

Options	Number of Shares			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2017		1,328		$	2.50			$	6,175
Exercised		(177	)		2.42			$	407
Forfeited or cancelled		(36	)		4.40
Outstanding at December 31, 2018		1,115		$	2.45			$	970
Exercised		(49	)	$	1.75			$	70
Forfeited or cancelled		(122	)		4.65
Outstanding at December 31, 2019		944			2.20			$	627
Exercised		(10	)		1.92			$	11
Forfeited or cancelled		(50	)		2.87
Outstanding at December 31, 2020		884		$	2.17		1.78	$	722
Vested and Exercisable at December 31, 2020		884		$	2.17		1.78	$	722

Summary of Nonvested Restricted Stock and Restricted Stock Units Activity

The following is a summary of non-vested restricted stock and restricted stock units activity: (in thousands, except grant date fair value data):

	Number of Shares			Weighted-Average Grant Date Fair Value
Nonvested balance at December 31, 2017		1,557		$	7.18
Granted		1,121			3.20
Vested		(798	)		6.11
Forfeited or cancelled		(104	)		7.28
Nonvested balance at December 31, 2018		1,776		$	5.08
Granted		1,582			2.74
Vested		(1,012	)		4.58
Forfeited or cancelled		(90	)		4.69
Nonvested balance at December 31, 2019		2,256		$	3.64
Granted		2,623			2.96
Vested		(1,427	)		3.63
Forfeited or cancelled		(81	)		3.15
Nonvested balance at December 31, 2020		3,371		$	3.12