XML 38 R27.htm IDEA: XBRL DOCUMENT v3.5.0.2
Organization and operations (Details)
 1 Months Ended 9 Months Ended
Feb. 03, 2015
USD ($)
$ / shares
shares
Feb. 28, 2015
USD ($)
$ / shares
shares
Sep. 30, 2016
USD ($)
segment
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Subsidiary, Sale of Stock [Line Items]          
Number of reportable segments | segment     2    
Proceeds from IPO, net of offering costs $ 79,900,000 $ 79,900,000 $ 0 $ 80,435,430  
Underwriting discounts, commissions, and offering expenses   $ 8,000,000      
Retained earnings (accumulated deficit)     (68,745,578)   $ (37,152,490)
Cash, cash equivalents, and marketable securities     $ 67,333,854    
IPO          
Subsidiary, Sale of Stock [Line Items]          
Common stock, shares issued | shares 5,491,191 5,491,191      
Common stock, price per share (in usd per share) | $ / shares $ 16.00 $ 16.00      
Over-Allotment Option          
Subsidiary, Sale of Stock [Line Items]          
Common stock, shares issued | shares 91,191 91,191