Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets

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Consolidated Balance Sheets - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 7,377,139 $ 8,320,317
Marketable securities 6,851,515 22,131,936
Prepaid expenses and other current assets 1,986,484 988,799
Total current assets 16,215,138 31,441,052
Property and equipment, net 1,195,506 1,076,099
Operating lease right-of-use assets 3,150,932  
Other assets 355,420 355,420
Total assets 20,916,996 32,872,571
Current liabilities:    
Accounts payable 1,252,198 1,427,287
Accrued liabilities 2,032,616 4,369,732
Current portion of lease liabilities 625,541
Total current liabilities 3,910,355 5,797,019
Deferred rent   679,182
Warrant liabilities 4,345,902 20,781,663
Long-term portion of lease liabilities 3,399,926
Other liabilities 72,747 72,747
Total liabilities 11,728,930 27,330,611
Commitments and contingencies
Stockholders' equity:    
Preferred stock, $0.0001 par value, 25,000,000 shares authorized and none outstanding at June 30, 2019 and December 31, 2018  
Common stock, $0.0001 par value, 200,000,000 shares authorized; 79,409,556 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively 7,941 7,941
Additional paid-in capital 205,577,912 204,884,211
Accumulated other comprehensive income (loss) 1,996 (30,300)
Accumulated deficit (196,399,783) (199,319,892)
Total stockholders' equity 9,188,066 5,541,960
Total liabilities and stockholders' equity $ 20,916,996 $ 32,872,571