XML 51 R40.htm IDEA: XBRL DOCUMENT v3.19.1
Stockholder's Equity - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Nov. 21, 2017
Mar. 31, 2019
Dec. 31, 2018
Nov. 21, 2018
Feb. 12, 2018
Class of Stock [Line Items]          
Preferred stock, shares authorized (in shares)   10,000,000 10,000,000   10,000,000
Preferred stock, par value (in dollars per share)   $ 0.00001 $ 0.00001   $ 0.00001
Preferred stock, shares issued (in shares)   0 0    
Preferred stock, shares outstanding (in shares)   0 0    
Common stock, shares authorized (in shares)   100,000,000 100,000,000   100,000,000
Common stock, par value (in dollars per share)   $ 0.00001 $ 0.00001   $ 0.00001
Common stock, shares, issued (in shares)   27,285,363 27,274,991    
Common stock, shares, outstanding (in shares)   27,285,363 27,274,991    
Maximum number of shares authorized under the plan (in shares) 4,361,291        
Annual increase percentage of maximum shares outstanding (equal to) 4.00%        
Additional capital shares reserved for future issuance (in shares)       1,091,000  
Capital shares reserved for future issuance (in shares)   1,283,193      
Contractual term   10 years      
Capitalized compensation expense   $ 17,000      
Minimum          
Class of Stock [Line Items]          
Award vesting period   2 years      
Maximum          
Class of Stock [Line Items]          
Award vesting period   4 years