XML 61 R50.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock Based Compensation - Narrative (Details)
Sep. 30, 2017
USD ($)
shares
Dec. 31, 2016
shares
May 28, 2014
event
shares
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Outstanding number of shares underlying options (in shares) 1,206,000 1,222,000  
Unrecognized stock-based compensation expense | $ $ 0    
Equity Incentive Plan, 2014 | Stock Options      
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Shares available for issuance (in shares) 733,000   4,400,000
Equity Incentive Plan, 2014 | Minimum      
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Number of events to occur to permit granting (or more) | event     1
Stock Incentive Plan, 2000 | Stock Options      
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Shares available for issuance (in shares) 0    
Outstanding number of shares underlying options (in shares) 3,000    
Stock Incentive Plan, 2007 | Stock Options      
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Shares available for issuance (in shares) 0    
Outstanding number of shares underlying options (in shares) 1,203,000    
Stock Incentive Plan, 2007 | Unvested restricted stock      
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Outstanding number of shares underlying restricted stock awards (in shares) 184,000