Quarterly report pursuant to Section 13 or 15(d)

Significant accounting policies (Narrative) (Details)

v3.7.0.1
Significant accounting policies (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Cash, cash equivalents and short-term investments:    
Cash and cash equivalent investment portfolio, percentage 100.00%  
Management fees $ 4,431 $ 5,912