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Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2019
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 September 30, |  | Nine months ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Net sales: |  |  |  |  |  |  |
Commercial | $ | 1,733 |  |  | $ | 2,292 |  |  | $ | 5,847 |  |  | $ | 7,469 |
Military | 1,182 |  |  | 2,866 |  |  | 3,327 |  |  | 7,520 |
Total net sales | $ | 2,915 |  |  | $ | 5,158 |  |  | $ | 9,174 |  |  | $ | 14,989 |
Reconciliation of basic and diluted income (loss) per share | The following is a reconciliation of the numerator and denominator of the basic and diluted net loss per share computations for the periods presented below (in thousands):
| Three months ended September 30, |  | Nine months ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Numerator: |  |  |  |  |  |  |
Net loss | $ | (946 | ) |  | $ | (1,920 | ) |  | $ | (6,065 | ) |  | $ | (6,114 | )
Denominator: |  |  |  |  |  |  |
Basic weighted average common shares outstanding | 12,370 |  |  | 12,059 |  |  | 12,278 |  |  | 11,970 |
Diluted weighted average shares | 12,370 |  |  | 12,059 |  |  | 12,278 |  |  | 11,970 |
Schedule of warranty activity | The following table summarizes warranty activity for the periods presented (in thousands):
| Three months ended September 30, |  | Nine months ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Balance at beginning of period | $ | 342 |  |  | $ | 196 |  |  | $ | 258 |  |  | $ | 174 |
Warranty accruals for current period sales | 5 |  |  | 31 |  |  | 34 |  |  | 46 |
Adjustments to existing warranties | — |  |  | 47 |  |  | 77 |  |  | 101 |
In kind settlements made during the period | (4 | ) |  | (14 | ) |  | (26 | ) |  | (61 | )
Accrued warranty reserve | $ | 343 |  |  | $ | 260 |  |  | $ | 343 |  |  | $ | 260 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&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://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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- 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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