Annual report pursuant to Section 13 and 15(d)

2. Significant Accounting Policies (Details)

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2. Significant Accounting Policies (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Assets    
Cash equivalents $ 8,872,982 [1] $ 2,009,018 [2]
Restricted cash 800,031 [3] 800,393 [4]
Total 9,673,013 2,809,411
Level 1    
Assets    
Cash equivalents 8,872,982 [1] 2,009,018 [2]
Restricted cash 31 [3] 393 [4]
Total 8,873,013 2,009,411
Level 2    
Assets    
Cash equivalents 0 [1] 0 [2]
Restricted cash 800,000 [3] 800,000 [4]
Total $ 800,000 $ 800,000
[1] Cash equivalents represent the fair value of the Company's investments in two money market accounts at December 31, 2017.
[2] Cash equivalents represent the fair value of the Company's investments in two money market accounts at December 31, 2016.
[3] Restricted cash represents the fair value of the Company's investments in an $800,000 certificate of deposit and $31 in a money market account at December 31, 2017.
[4] Restricted cash represents the fair value of the Company's investments in an $800,000 certificate of deposit and $393 in a money market account at December 31, 2016.