CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 6,514,215	$ 9,829,624
Restricted cash	0	126,595
Accounts receivable	28,278	9,939
Inventory	130,920	186,920
Prepaid expenses and other current assets	435,972	162,088
Total current assets	7,109,385	10,315,166
Property and equipment, net	27,954	74,460
Total assets	7,137,339	10,389,626
Current liabilities:
Accounts payable	805,516	342,530
Accrued expenses and other current liabilities	230,752	764,340
Total current liabilities	1,036,268	1,106,870
Total liabilities	1,036,268	1,106,870
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized at June 30, 2019 and December 31, 2018; none issued or outstanding at June 30, 2019 and December 31, 2018	0	0
Common stock, $0.0001 par value; 100,000,000 shares authorized at June 30, 2019 and December 31, 2018; 18,069,476 and 18,069,476 shares issued at June 30, 2019 and December 31, 2018, and 18,068,642 and 18,067,392 shares outstanding at June 30, 2019 and December 31, 2018, respectively	1,807	1,807
Additional paid-in capital	142,675,746	142,242,224
Accumulated deficit	(136,576,482)	(132,961,275)
Total stockholders' equity	6,101,071	9,282,756
Total liabilities and stockholders' equity	$ 7,137,339	$ 10,389,626