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Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2022
Accounting Policies [Abstract] |
Disaggregation of revenue | The following table provides a disaggregation of product net sales for the periods presented (in thousands):
| Three months ended March 31, |  |  |
| 2022 |  | 2021 |  |  |  |  |
Net sales: |  |  |  |  |  |  |  |
Commercial | $ | 1,134 |  |  | $ | 913 |  |  |  |  |  |
MMM products | 927 |  |  | 1,724 |  |  |  |  |  |
Total net sales | $ | 2,061 |  |  | $ | 2,637 |  |  |  |  |  |
Reconciliation of basic and diluted income (loss) per share | The following table presents a reconciliation of basic and diluted loss per share computations (in thousands):
| Three months ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Numerator: |  |  |  |  |  |  |
Net loss | $ | (2,821) |  |  | $ | (1,642) |  |  |  |  |
Denominator: |  |  |  |  |  |  |
Basic and diluted weighted average shares of common stock outstanding | 6,437 |  |  | 3,612 |  |  |  |  |
Schedule of warranty activity | The following table summarizes warranty activity for the periods presented (in thousands):
|  |  | Three months ended March 31,
|  |  |  |  | 2022 |  | 2021
Balance at beginning of period |  |  |  |  | $ | 295 |  |  | $ | 227 |
Warranty accruals for current period sales |  |  |  |  | (1) |  |  | 17 |
Adjustments to existing warranties |  |  |  |  | (15) |  |  | 14 |
In kind settlements made during the period |  |  |  |  | (14) |  |  | (19) |
Accrued warranty reserve at end of period |  |  |  |  | $ | 265 |  |  | $ | 239 |
Summary of assets and liabilities measured on recurring basis |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + 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=123368208&loc=d3e12565-110249 + Details
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