Stock Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense included in selling, general and administrative expense	$ 2,700	$ 1,000
Stock-based compensation expense, tax benefit	121	18
Total stock-based compensation expense	$ 2,706	$ 1,039
Options granted (in shares)	122,000
Weighted average grant date fair value of options granted (in dollars per share)	$ 24.87	$ 19.36
Total intrinsic value of options exercised	$ 5,400	$ 1,600
Unrecognized compensation expense	$ 1,800
Restricted stock awards granted (in shares)	225,000	79,000
Share price (in dollars per share)	$ 0.02	$ 0.02
Weighted average grant date fair value (in dollars per share)	$ 24.77	$ 17.08
Shares released (in shares)	13,000	31,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 2,200	$ 700
Restricted stock awards cancelled (in shares)	53,000	13,000
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards cancelled (in shares)	38,000	12,000
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Equity Incentive Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under plan approved by directors (in shares)	2,000,000.0
Equity Incentive Plan 2015 | Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Equity Incentive Plan 2015 | Employee Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Equity Incentive Plan 2015 | Employee Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Equity Incentive Plan 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under plan approved by directors (in shares)	2,250,000.00
Options granted (in shares)			0
Equity Incentive Plan 2005 | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted (in shares)		0	0
Equity Incentive Plan 2005 | Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Equity Incentive Plan 2005 | Employee Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Equity Incentive Plan 2005 | Employee Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years