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Fair Value Measurements (Details)
 6 Months Ended
Jun. 30, 2018
USD ($)
Cash, Adjusted Cost $ 1,073,436
Cash, Change in Fair Value
Cash, Fair Value 1,073,436
Cash, Cash and Cash Equivalents 1,073,436
Cash, Digital Tokens
Certificates of deposit, Adjusted Cost 250,015
Certificates of deposit, Change in Fair Value
Certificates of deposit, Fair Value 250,015
Certificates of deposit, Cash and Cash Equivalents 250,015
Certificates of deposit, Digital Tokens
Adjusted Cost 7,738,837
Fair Value 7,738,837
Cash and Cash Equivalents 7,738,837
Level 1 [Member]  
Adjusted Cost 6,415,386
Change in Fair Value
Fair Value 6,415,386
Cash and Cash Equivalents 6,415,386
Level 1 [Member] | U.S. Treasury securities [Member]  
Adjusted Cost 5,714,143
Change in Fair Value
Fair Value 5,714,143
Cash and Cash Equivalents 5,714,143
Level 1 [Member] | Money market funds [Member]  
Adjusted Cost 701,243
Change in Fair Value
Fair Value 701,243
Cash and Cash Equivalents $ 701,243