Annual report pursuant to Section 13 and 15(d)

Business and summary of significant accounting policies - Impairment of long-lived assets (Details)

v3.7.0.1
Business and summary of significant accounting policies - Impairment of long-lived assets (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Impairment loss $ 95,773 $ 2,975,744