Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash equivalents	$ 1,744,965
Total assets measured at fair value on recurring basis	1,744,965
Liabilities [Abstract]
Common stock warrants		$ 4,641
Fair Value, Measurements, Recurring
Assets
Cash equivalents		833,831
Total assets measured at fair value on recurring basis		833,831
Liabilities [Abstract]
Common stock warrants		4,641
Total liabilities measured at fair value on recurring basis		4,641
Fair Value, Measurements, Recurring | Level 1
Assets
Cash equivalents	1,744,965	833,831
Total assets measured at fair value on recurring basis	1,744,965	833,831
Liabilities [Abstract]
Common stock warrants		0
Total liabilities measured at fair value on recurring basis		0
Fair Value, Measurements, Recurring | Level 2
Assets
Cash equivalents	0	0
Total assets measured at fair value on recurring basis	0	0
Liabilities [Abstract]
Common stock warrants		0
Total liabilities measured at fair value on recurring basis		0
Fair Value, Measurements, Recurring | Level 3
Assets
Cash equivalents	0	0
Total assets measured at fair value on recurring basis	$ 0	0
Liabilities [Abstract]
Common stock warrants		4,641
Total liabilities measured at fair value on recurring basis		$ 4,641