Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net (loss) income	$ (12,610,083)	$ 32,460,894
Adjustments to reconcile net (loss) income to net cash used in operating activities
Stock-based compensation, net	346,626	287,339
Depreciation and amortization	975,295	968,034
Issuance of common stock for services	60,000	60,000
Derivative loss (gain)	1,232,925	(41,110,851)
Changes in operating assets and liabilities
Increase in prepaid expenses and other	(1,389,634)	(278,666)
Increase (decrease) in accounts payable and accrued expenses	805,085	(2,154,477)
Decrease in lease liability	(51,907)	(44,652)
Net cash used in operating activities	(10,631,693)	(9,812,379)
Cash flows used in investing activities
Purchase of fixed assets	(14,120)	(485,750)
Net cash used in investing activities	(14,120)	(485,750)
Cash flows from financing activities
Proceeds from sale of common stock in connection with the equity distribution agreement	142,321	0
Costs related to sale of common stock in connection with the equity distribution agreement	(144,329)	0
Proceeds from sale of common stock in connection with the public offering	12,000,000	8,000,000
Costs related to sale of common stock in connection with the public offering	(1,243,372)	(844,409)
Proceeds from warrant exercises	350,000	2,969,119
Proceeds from option exercises	0	636,410
Net cash provided by financing activities	11,104,620	10,761,120
Net change in cash and cash equivalents	458,807	462,991
Cash and cash equivalents at beginning of period	7,585,392	8,209,071
Cash and cash equivalents at end of period	8,044,199	8,672,062
Non-cash transactions:
Initial lease liability arising from the adoption of ASU 2016-02	1,704,153	0
Initial recognition of right-of-use asset arising from the adoption of ASU 2016-02	1,167,821	0
Warrant derivative liability in connection with the public offering	$ 0	$ 8,008,500