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Stockholders' Equity Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Stockholders' Equity Note [Abstract] |
Summary of Impact of Results of Stock-Based Compensation |
| For the year ended December 31,
| 2020 |  | 2019 |  |
Cost of sales | $ | 2 |  |  | $ | 9 |  |  |
Product development | 10 |  |  | 26 |  |  |
Selling, general, and administrative | 119 |  |  | 581 |  |  |
Total stock-based compensation | $ | 131 |  |  | $ | 616 |  |  |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions | Estimates utilized in the calculation include the expected life of the option, risk-free interest rate, and expected volatility, and are further comparatively detailed as follows:
| 2020 |  | 2019 |  |
Fair value of options issued | $ | 2.06 |  |  | $ | 1.45 |  |  |
Exercise price | $ | 2.68 |  |  | $ | 2.20 |  |  |
Expected life of option (in years) | 6.1 |  | 4.8 |  |
Risk-free interest rate | 0.7 | % |  | 1.8 | % |  |
Expected volatility | 93.6 | % |  | 90.0 | % |  |
Dividend yield | 0.00 | % |  | 0.00 | % |  |
Summary of Option Activity | A summary of option activity under all plans was as follows:
| Number of Options |  | Weighted Average Exercise Price Per Share
Outstanding at December 31, 2018 | 58,574 |  |  | $ | 18.90 |
Granted | 137,860 |  |  | 2.20 |
Cancelled | (35,499) |  |  | 12.75 |
Expired | (5,505) |  |  | 26.65 |
Outstanding at December 31, 2019 | 155,031 |  |  | $ | 5.23 |
Granted | 112,350 |  |  | 2.68 |
Cancelled | (33,774) |  |  | 9.56 |
Exercised | (12,157) |  |  | 2.11 |
Outstanding at December 31, 2020 | 221,450 |  |  | $ | 3.45 |
Vested and expected to vest at December 31, 2020 | 177,827 |  |  | $ | 3.62 |
Exercisable at December 31, 2020 | 38,465 |  |  | $ | 7.88 |
Schedule of Options Outstanding | The options outstanding at December 31, 2020 have been segregated into ranges for additional disclosure as follows:
OPTIONS OUTSTANDING |  | OPTIONS EXERCISABLE
Range of Exercise Prices |  | Number of Shares Outstanding |  | Weighted Average Remaining Contractual Life (in years) |  | Weighted Average Exercise Price |  | Number of Shares Exercisable |  | Weighted Average Remaining Contractual Life (in years) |  | Weighted Average Exercise Price
$1.45 | — | $1.48 |  | 27,525 |  |  | 9.2 |  | $ | 1.45 |  |  | 425 |  |  | 9.2 |  | $ | 1.45 |
$1.49 | — | $1.68 |  | 50,000 |  |  | 9.2 |  | 1.50 |  |  | — |  |  | 9.2 |  | 1.50 |
$1.69 | — | $2.25 |  | 80,975 |  |  | 8.6 |  | 2.10 |  |  | 21,250 |  |  | 8.5 |  | 2.10 |
$2.26 | — | $5.79 |  | 31,380 |  |  | 8.8 |  | 2.55 |  |  | 7,420 |  |  | 8.7 |  | 2.40 |
$5.80 | — | $53.50 |  | 31,570 |  |  | 8.1 |  | 12.64 |  |  | 9,370 |  |  | 4.3 |  | 25.61 |
|  |  |  | 221,450 |  |  | 8.8 |  | $ | 3.45 |  |  | 38,465 |  |  | 7.6 |  | $ | 7.88 |
Summary of Restricted Stock Activity | The following table shows a summary of restricted stock unit activity:
|  |  | Restricted Stock Units Outstanding |  | Weighted Average Grant Date Fair Value
At December 31, 2018 |  |  | 109,371 |  |  | $ | 12.70 |
Granted |  |  | 17,115 |  |  | 3.10 |
Vested |  |  | (87,256) |  |  | 11.15 |
Forfeited |  |  | (32,627) |  |  | 11.65 |
At December 31, 2019 |  |  | 6,603 |  |  | $ | 13.17 |
Granted |  |  | 19,200 |  |  | 2.44 |
Vested |  |  | (20,068) |  |  | 3.96 |
Forfeited |  |  | (1,255) |  |  | 12.40 |
At December 31, 2020 |  |  | 4,480 |  |  | $ | 8.64 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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