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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Current Assets:    
Cash and cash equivalents $ 6,451 $ 7,607
Short-term held-to-maturity investments 2,606 0
Accounts receivable, net 79 33
Contract assets 20 39
Prepaid expenses and other assets 577 345
Total current assets 9,733 8,024
Fixed assets, net 384 530
Patents and other intangible assets, net 798 799
Other assets 10 10
Total Assets 10,925 9,363
Current Liabilities:    
Accounts payable and accrued liabilities 296 224
Current portion of lease liabilities 133 205
Accrued compensation and related taxes 471 218
Contract liabilities 247 84
Total current liabilities 1,147 731
Long Term Liabilities:    
Long term lease liabilities 226 350
Total liabilities 1,373 1,081
Commitments and contingencies (note 11)
Stockholders' Equity:    
Preferred stock, $0.0001 par value, zero shares issued and outstanding
Common stock, $0.0001 par value, 38,023,701 and 31,581,666 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively 4 3
Additional paid-in capital 98,079 91,035
Accumulated other comprehensive income (loss) (8) 9
Accumulated deficit (88,523) (82,765)
Total equity 9,552 8,282
Total Liabilities and Equity $ 10,925 $ 9,363