XML 40 R27.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock based compensation - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 10, 2018
Mar. 31, 2017
Mar. 31, 2014
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2017
Jul. 19, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options outstanding       1,605,790   1,605,790       539,896  
Common stock, shares outstanding       11,422,161   11,422,161       6,047,161  
Stock options awards granted           1,066,050          
Unamortized stock-based compensation expense       $ 1,089,491   $ 1,089,491          
Amortized weighted average period           3 years 7 months 6 days          
Common stock, shares issued       11,422,161   11,422,161       6,047,161  
Cerulean/Private Dare Stock Purchase Transaction [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Common stock, shares issued       3,140,000   3,140,000          
Stock Options [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock-based compensation expense       $ 39,991 $ 6,947 $ 58,538 $ 6,953        
2015 Stock Incentive Plan [Member] | Private Dare [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options awards granted           0          
2015 Stock Incentive Plan [Member] | Stock Options [Member] | Private Dare [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options grant period           10 years          
Stock options vesting period           3 years          
Stock options outstanding       10,149   10,149         50,000
2015 Stock Incentive Plan [Member] | Restricted Stock [Member] | Private Dare [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Shares issued to non-employees               200,000 900,000    
Common stock, shares outstanding       223,295   223,295          
2014 Employee Stock Purchase Plan [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Offering period     6 months                
Purchase price as percentage of stock price on offering period     85.00%                
Stock-based compensation expense           $ 0 $ 0        
Amended and Restated 2014 Plan [Member] | Stock Options [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options outstanding 2,000,000                    
Share-based compensation description           The number of shares authorized for issuance under the Amended 2014 Plan is 2,046,885, which is the sum of (a) 1,509,463 shares of common stock plus (b) 537,422 shares of common stock subject to awards granted under the 2014 Plan. The number of authorized shares will increase annually on the first day of each fiscal year until, and including, the fiscal year ending December 31, 2024 by the least of (i) 2,000,000, (ii) 4% of the number of outstanding shares of common stock on such date, or (iii) an amount determined by the Company’s board of directors.          
Options to purchase number of outstanding shares of common stock 2,046,885     1,605,790   1,605,790          
Number of outstanding shares of common stock authorized 1,509,463                    
Number of outstanding shares of common stock authorized subject to grant 537,422                    
Annual percentage increase in outstanding number of common stock 4.00%                    
Exercise period for stock options after termination date   2 years                  
Unamortized fair value expense   $ 3,700,000                  
Common stock reserved for future issuance       451,244   451,244