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Critical Accounting Policies and Estimates (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
Accounting Policies [Abstract] |  |
Allowance for doubtful accounts | $ 53,000 | $ 90,000
Accounts receivable for chargebacks | 311,000 | 222,000
Allowance for slow moving and obsolete inventory | 319,000 | 362,000
Amount of revenue from contract liabilities related to open jobs outstanding | 3,547,000 |
Estimated liability for compensation claims | 898,000 | 916,000
Liability for post retirement healthcare benefits | 9,113,000 | 9,080,000
Contract with Customer, Asset, after Allowance for Credit Loss, Current | 679,000 | 17,000
Cash and cash equivalents | $ 114,000 | $ 6,146,000

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