Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash	$ 219,966,167	$ 13,968,742
Prepaid and other current assets	413,095	1,246,360
Total current assets	220,379,262	15,215,102
Equipment, net	30,623	51,832
Other assets	139,875	112,345
Total assets	220,549,760	15,379,279
Current liabilities:
Accounts payable	10,943,325	3,687,245
Accrued expenses and other current liabilities	10,949,128	3,843,299
Loan payable, current portion	2,602,292	3,291,394
Total current liabilities	24,494,745	10,821,938
Loan payable, long-term	17,332,626	3,619,420
Total liabilities	41,827,371	14,441,358
Stockholders' equity:
Preferred stock, $0.0001 par value per share (10,000,000 shares authorized, none issued and outstanding at December 31, 2019 and December 31, 2018, respectively)
Common stock, $0.0001 par value per share (150,000,000 shares authorized, 36,933,217 and 30,087,213 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively)	3,693	3,009
Additional paid-in capital	354,614,189	108,485,219
Accumulated deficit	(175,895,493)	(107,550,307)
Total stockholders' equity	178,722,389	937,921
Total liabilities and stockholders' equity	$ 220,549,760	$ 15,379,279