XML 31 R20.htm IDEA: XBRL DOCUMENT v3.7.0.1
Summary of Significant Accounting Policies (Detail Textuals)
3 Months Ended
Mar. 31, 2017
USD ($)
Segment
Mar. 31, 2017
GBP (£)
Segment
Dec. 31, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Accounting Policies [Abstract]          
Cash and cash equivalents $ 12,729,000   $ 16,520,000 $ 17,115,000 $ 20,440,000
Number of operating segments | Segment 1        
Number of geographic areas for development operations | Segment 2 2      
Cash balances insured by FDIC $ 250,000        
Cash exceeding balance insured by FDIC 11,600,000        
Cash insured by the financial services compensation scheme | £   £ 75,000      
Cash Exceeding Balance Insured By Financia Lservices Compensation Scheme $ 800,000