Fair Value Measurements (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Marketable securities:
Derivative instruments, fair value		$ 336,862
Recurring
Cash equivalents:
Total cash equivalents	$ 0	1,133,280
Marketable securities:
Derivative instruments, fair value	445,838	336,862
Total derivative liabilities measured at fair value	445,838	336,862
Total assets and liabilities measured at fair value	445,838	1,470,142
Recurring | Money market funds and commercial paper
Cash equivalents:
Total cash equivalents	0	1,133,280
Recurring | Fair Value, Inputs, Level 1
Cash equivalents:
Total cash equivalents	0	1,133,280
Marketable securities:
Derivative instruments, fair value	0	0
Total derivative liabilities measured at fair value	0	0
Total assets and liabilities measured at fair value	0	1,133,280
Recurring | Fair Value, Inputs, Level 1 | Money market funds and commercial paper
Cash equivalents:
Total cash equivalents	0	1,133,280
Recurring | Fair Value, Inputs, Level 2
Cash equivalents:
Total cash equivalents	0	0
Marketable securities:
Derivative instruments, fair value	0	0
Total derivative liabilities measured at fair value	0	0
Total assets and liabilities measured at fair value	0	0
Recurring | Fair Value, Inputs, Level 2 | Money market funds and commercial paper
Cash equivalents:
Total cash equivalents	0	0
Recurring | Fair Value, Inputs, Level 3
Cash equivalents:
Total cash equivalents	0	0
Marketable securities:
Derivative instruments, fair value	445,838	336,862
Total derivative liabilities measured at fair value	445,838	336,862
Total assets and liabilities measured at fair value	445,838	336,862
Recurring | Fair Value, Inputs, Level 3 | Money market funds and commercial paper
Cash equivalents:
Total cash equivalents	$ 0	$ 0