Summary Of Significant Accounting Policies | 1. Summary of Significant Accounting Policies. Description of Business . Basis of Presentation . Cash and Cash Equivalents and Restricted Cash. June 30, December 31, 2022 2021 Cash and cash equivalents $ 2,302,000 $ 3,766,000 Restricted cash 85,000 85,000 Total cash, cash equivalents and restricted cash $ 2,387,000 $ 3,851,000 Inventories . Property and Equipment . June 30, December 31, 2022 2021 Property and Equipment: Production tooling, machinery and equipment $ 27,000 $ 27,000 Office furniture and fixtures 95,000 95,000 Computer equipment and software 756,000 753,000 Leasehold improvements 19,000 19,000 Construction in-progress 16,000 4,000 913,000 898,000 Accumulated depreciation and amortization (816,000 ) (785,000 ) Net Property and Equipment $ 97,000 $ 113,000 Depreciation expense was approximately $15,000 and $31,000 in the three and six months ended June 30, 2022, respectively, and was $11,000 and $32,000 in the three and six months ended June 30, 2021, respectively. Stock-Based Compensation During the six-month periods ended June 30, 2022 and 2021 no equity awards were issued by the Company, except those awarded to non-employee members of the Board of Directors in June 2021. In June 2021, non-employee members of the Board of Directors received restricted stock grants totaling 5,514 shares pursuant to the 2018 Equity Incentive Plan. The shares underlying the awards were assigned a value of $8.16 per share, which was the closing price of the Company’s common stock on the date of grant, for a total grant date value of $45,000. The shares vested on June 1, 2022. Total stock-based compensation expense recorded for the three and six months ended June 30, 2022 was $29,000 and $59,000, respectively, and for the three and six months ended June 30, 2021 was $86,000 and $142,000, respectively. Net Loss per Share . Due to the net loss incurred during the three and six months ended June 30, 2022 and 2021 all outstanding stock awards were anti-dilutive for those periods. As of June 30, 2022, the Company had 14,086 options and 3,396 restricted units outstanding. As of June 30, 2021, the Company had 21,741 options and 37,879 restricted units outstanding. Weighted average common shares outstanding for the three and six months ended June 30, 2022 and 2021 were as follows: Three Months Ended Six Months Ended June 30 June 30 2022 2021 2022 2021 Denominator for basic net loss per share - weighted average shares 1,788,000 1,755,000 1,787,000 1,753,000 Effect of dilutive securities: Stock options and restricted stock units — — — — Denominator for diluted net loss per share - weighted average shares 1,788,000 1,755,000 1,787,000 1,753,000 |