XML 53 R42.htm IDEA: XBRL DOCUMENT v3.10.0.1
Organization and Summary of Significant Accounting Policies - Anti-dilutive Securities (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable        
Net dilutive potential common shares issuable (shares) 187 390 299 422
On exercise of options where exercise price is greater than average market value for the period        
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable        
Net dilutive potential common shares issuable (shares) 187 282 205 297
On exercise of options        
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable        
Net dilutive potential common shares issuable (shares) 0 108 89 125
On the settlement of employee stock purchase plan shares        
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable        
Net dilutive potential common shares issuable (shares) 0 0 5 0