Common Stock Equity Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Stock Option Activity

The following table summarizes the stock option activity, including options with market and performance conditions and options granted and forfeited from December 31, 2019 through March 31, 2020:

	Number of options	Weighted average exercise price		Weighted average remaining contractual term (years)
Outstanding at beginning of period	596,385	$	29.68	5.0
Options granted	—	—
Options exercised	—	—
Options forfeited	(1,633)	22.17
Options expired	(16,488)	0.68
Outstanding at end of period	578,264	$	31.64	7.8
Options exercisable at end of period	401,857	$	38.30	8.0