Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan - Textual (Details)

v3.8.0.1
Equity Incentive Plan - Textual (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Net proceeds from issuance of stock   $ 13,657,331 $ 0
Employee stock option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares)   167,725  
Options exercised (in shares)   26,743  
Employees | Phantom share units (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense (reversal of) associated with grants $ (174,804)    
Shares forfeited in period (in shares)   96,000  
Equity Incentive 2013 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share of common stock available for issuance under the Plan (in shares)   708,953  
Unrecognized compensation cost related to non-vested share-based compensation arrangement   $ 1,403,775  
Weighted average period for recognition   1 year 9 months 18 days  
Equity Incentive 2013 Plan | Employee stock option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Value of options granted   $ 296,107  
Compensation expense (reversal of) associated with grants   $ 130,952  
Options exercised (in shares)   26,743  
Net proceeds from issuance of stock   $ 11,143  
Equity Incentive 2013 Plan | Director      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares)   83,625  
Equity Incentive 2013 Plan | Employees      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares)   84,100