CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities:
Net loss	$ (3,196,486)	$ (2,419,885)
Reconciliation of net loss to net cash used in operating activities:
Changes in fair value of warrant liabilities	(1,000)	3,000
Stock-based compensation	136,193	376,317
Changes in operating assets and liabilities:
Prepaid expenses and deposits	(77,878)	(107,362)
Accounts payable and accrued expenses	792,849	224,252
Net cash used in operating activities	(2,346,322)	(1,923,678)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	18,125	0
Net cash provided by financing activities	18,125	0
Net decrease in cash	(2,328,197)	(1,923,678)
Cash at beginning of period	5,129,289	7,851,243
Cash at end of period	$ 2,801,092	$ 5,927,565