Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2020

Stockholders' Equity

Summary of stock option activity

The following table summarizes stock option activity for the six months ended June 30, 2020 (shares and intrinsic value in thousands):

		Weighted-		Weighted-average
		average		remaining contractual	Aggregate intrinsic
	Number of shares	exercise price		term	value
Outstanding at December 31, 2019	3,855	$	11.72	6.1	$	12,101
Granted	25		9.29	6.0		—
Exercised	—		—	—		—
Forfeited	—		—	—		—
Expired	—		—	—		—
Outstanding at June 30, 2020	3,880	$	11.66	5.6	$	46
Vested at June 30, 2020	3,102	$	11.56	4.7	$	32
Exercisable at June 30, 2020	3,102	$	11.56	4.7	$	32

Summary of restricted share activity

The following table summarizes restricted share activity for the six months ended June 30, 2020 (shares in thousands):

		Weighted-average
	Number of shares	grant date fair value
Outstanding at December 31, 2019	592	$	12.32
Granted	118		9.29
Vested	(237)		12.75
Forfeited	—		—
Outstanding at June 30, 2020	473	$	11.34

Time Based Stock Option | Black Scholes Pricing Model

Stockholders' Equity

Schedule of valuation assumptions

	Six Months Ended		Year Ended
Black-Scholes Option Valuation Assumptions	June 30, 2020		December 31, 2019
Risk-free interest rate	0.4	%	1.6	%
Dividend yield	—		—
Volatility	44.2	%	40.3	%
Weighted-average expected term (years)	6.0		6.0