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Condensed Consolidated Statements of Cash Flows - USD ($)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows from operating activities:    
Net loss $ (13,356,209) $ (16,108,056)
Adjustments to reconcile net loss to cash used in operating activities:    
Non-cash consideration received in licensing agreement transaction 0 (945,366)
Unrealized gain on equity investment (359,905) (207,068)
Interest income and accretion of discount on marketable securities (729,119) 0
Stock-based compensation expense 1,916,518 1,324,812
Depreciation and amortization expense 144,650 73,807
Amortization of right-of-use asset 253,307 0
Accretion of lease liability 288,501 88,291
Change in operating assets and liabilities:    
Prepaid expenses and other current assets 258,228 262,437
Security deposit 12,491 (4,305)
Accounts payable (121,420) (4,870,271)
Accrued expenses (419,302) 299,300
Net cash used in operating activities (12,112,260) (20,086,419)
Cash flows from investing activities:    
Purchase of marketable securities (9,757,591) 0
Sales/maturities of marketable securities 40,000,000 0
Issuance of short-term note receivable 0 (1,000,000)
Purchases of property and equipment (13,560) (45,935)
Software development and other costs 0 (30,230)
Net cash provided by (used in) investing activities 30,228,849 (1,076,165)
Cash flows from financing activities:    
Proceeds from exercise of options and purchases from employee stock purchase plan 66,993 33,079
Net cash provided by financing activities 66,993 33,079
Net increase (decrease) in cash, cash equivalents and restricted cash 18,183,582 (21,129,505)
Cash, cash equivalents and restricted cash, at beginning of period 46,798,599 189,728,285
Cash, cash equivalents and restricted cash, at end of period 64,982,181 168,598,780
Non-cash investing and financing activities:    
Right-of-use asset in exchange for lease liability $ 0 $ 15,779,773