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Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Current Assets:    
Cash and cash equivalents $ 5,328 $ 6,451
Short-term held-to-maturity investments 3,161 2,606
Accounts receivable, net 50 79
Contract assets 4 20
Prepaid expenses and other assets 317 577
Total current assets 8,860 9,733
Fixed assets, net 515 384
Patents and other intangible assets, net 782 798
Other assets 10 10
Total Assets 10,167 10,925
Current Liabilities:    
Accounts payable and accrued liabilities 398 296
Current portion of lease liabilities 77 133
Accrued compensation and related taxes 253 471
Contract liabilities 639 247
Total current liabilities 1,367 1,147
Long Term Liabilities:    
Long term lease liabilities 213 226
Total liabilities 1,580 1,373
Commitments and contingencies (note 11)
Stockholders' Equity:    
Preferred stock, $0.0001 par value, zero shares issued and outstanding
Common stock, $0.0001 par value, 38,545,556 and 38,023,701 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively 4 4
Additional paid-in capital 98,543 98,079
Accumulated other comprehensive income (loss) (8) (8)
Accumulated deficit (89,952) (88,523)
Total equity 8,587 9,552
Total Liabilities and Equity $ 10,167 $ 10,925