Stock Based Compensation - Plans - (Details)	Nov. 03, 2018 shares
1987 Plan
Authorized And Available For Grant [Line Items]
Options And/Or Restrcited Stock Initially Authorized	5,850,000
Options And Or Restricted Stock Available For Grant	0
2004 Plan
Authorized And Available For Grant [Line Items]
Options And/Or Restrcited Stock Initially Authorized	1,350,000
Options And Or Restricted Stock Available For Grant	0
2013 Plan
Authorized And Available For Grant [Line Items]
Options And/Or Restrcited Stock Initially Authorized	1,500,000
Options And Or Restricted Stock Available For Grant	0
2018 Plan
Authorized And Available For Grant [Line Items]
Options And/Or Restrcited Stock Initially Authorized	4,725,000
Options And Or Restricted Stock Available For Grant	4,503,140