Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 66,215,678	$ 43,489,935
Investments, at fair value	1,220,987	0
Prepaid expenses and other	977,658	322,493
Total current assets	68,414,323	43,812,428
Property and equipment, net	1,617,053	1,046,514
Other assets	221,923	242,023
Intangible assets, net	17,457,631	0
Total assets	87,710,930	45,100,965
Current liabilities:
Accounts payable	2,089,680	2,087,770
Payable to related parties	0	2,228,366
Accrued liabilities	544,803	745,961
Total current liabilities	2,634,483	5,062,097
Note payable, net of discount	1,499,108	1,498,754
Other liabilities	55,195	0
Total liabilities	4,188,786	6,560,851
Commitments and contingencies
Stockholders' equity:
Preferred stock, $1.00 par value: 5,000,000 shares authorized and 0 shares issued and outstanding at June 30, 2018 and December 31, 2017	0	0
Common stock, $.01 par value: 170,0000,000 shares authorized at June 30, 2018 and December 31, 2017; 86,589,032 shares and 69,901,625 shares issued at June 30, 2018 and December 31, 2017, respectively	865,890	699,015
Common stock to be issued for 15,162 shares	56,858	0
Additional paid-in capital	552,093,693	498,577,372
Treasury stock, at cost: 79,545 shares held at June 30, 2018 and December 31, 2017	(8,034,244)	(8,034,244)
Accumulated other comprehensive loss	(539,642)	0
Accumulated deficit	(460,920,411)	(452,702,029)
Total stockholders' equity	83,522,144	38,540,114
Total liabilities and stockholders' equity	$ 87,710,930	$ 45,100,965