1. Summary Of Significant Accounting Policies | 1. Summary of Significant Accounting Policies. Description of Business . Basis of Presentation . Cash and Cash Equivalents and Restricted Cash. March 31, December 31, 2022 2021 Cash and cash equivalents $ 396,000 $ 3,766,000 Restricted cash 85,000 85,000 Total cash, cash equivalents and restricted cash $ 481,000 $ 3,851,000 Inventories . Property and Equipment . March 31, 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 757,000 753,000 Leasehold improvements 19,000 19,000 Construction in-progress 10,000 4,000 908,000 898,000 Accumulated depreciation and amortization (801,000 ) (785,000 ) Net Property and Equipment $ 107,000 $ 113,000 Depreciation expense was approximately $16,000 and $21,000 in the three months ended March 31, 2022 and 2021, respectively. Stock-Based Compensation During the three months ended March 31, 2022 and 2021, no stock options or restricted stock were issued by the Company. The Company estimated the fair value of stock-based awards granted during the three months ended March 31, 2022, under the Company’s employee stock purchase plan using the following weighted average assumptions: expected life of 1.0 year, expected volatility of 168.7%, dividend yield of 0% and risk-free interest rate of 0.4%. The Company recorded total stock-based compensation expense of $30,000 and $56,000 for the three months ended March 31, 2022 and 2021, respectively. Net Income (Loss) per Share . Options to purchase approximately 14,000 shares of common stock with a weighted average exercise price of 12.60, were outstanding at March 31, 2022 and were not included in the computation of common stock equivalents for the three months ended March 31, 2022 because their exercise prices were higher than the average fair market value of the common stock during the reporting period. Due to the net loss incurred during the three months ended March 31, 2021 all outstanding stock options were anti-dilutive for the periods. Weighted average common shares outstanding for the three months ended March 31, 2022 and 2021 were as follows: Three months ended March 31 2022 2021 Denominator for basic net income (loss) per share - weighted average shares 1,786,000 1,751,000 Effect of dilutive securities: Stock options, restricted stock and restricted stock units 8,000 — Denominator for diluted net income (loss) per share - weighted average shares 1,794,000 1,751,000 |