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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Schedule of allowance for doubtful accounts | Activity within the Company’s allowance for doubtful accounts for the periods presented is as follows:
| 2020 |  | 2019
Beginning balance | $ | 1,589 |  |  | $ | 2,390 |
Additions (Subtractions) | 333 |  |  | (189) |
Deductions (write-offs/recoveries) from reserve | (326) |  |  | (612) |
Ending balance | $ | 1,596 |  |  | $ | 1,589 |
Summary of product warranty activity | The following table summarizes product warranty activity during 2020 and 2019:
| 2020 |  | 2019
Beginning balance | $ | 2,194 |  |  | $ | 1,916 |
Charges to expense | 1,091 |  |  | 2,186 |
Costs incurred | (1,473) |  |  | (1,908) |
Ending balance | $ | 1,812 |  |  | $ | 2,194 |
Revenue and related development costs, customer-funded research and development costs | Revenue and related development costs from customer-funded research and development are as follows:
| Year Ended December 31,
| 2020 |  | 2019
Customer-funded service sales | $ | 2,043 |  |  | $ | 5,816 |
Customer-funded costs included in costs of service sales | $ | 2,935 |  |  | $ | 4,373 |
Schedule of reconciliation of basic and diluted weighted average common shares outstanding | A reconciliation of the basic and diluted weighted average common shares outstanding is as follows:
| 2020 |  | 2019
Weighted average common shares outstanding—basic | 17,669 |  |  | 17,459 |
Dilutive common shares issuable in connection with stock plans | — |  |  | — |
Weighted average common shares outstanding—diluted | 17,669 |  |  | 17,459 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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