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17. QUARTERLY FINANCIAL INFORMATION (Unaudited) | 12 Months Ended
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Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract] |
17. QUARTERLY FINANCIAL INFORMATION (Unaudited) | 17. QUARTERLY FINANCIAL INFORMATION (Unaudited) The following table summarizes our unaudited quarterly financial information for the periods shown below (in thousands, except per share data): Quarterly Financial Information
|  |  | Fiscal Year 2021
|  |  | December 31, |  |  | September 30, |  |  | June 30, |  |  | March 31,
Revenue |  | $ | 557 |  | $ | 718 |  | $ | 746 |  | $ | 479
Gross profit |  |  | 509 |  |  | 728 |  |  | 777 |  |  | 484
Net loss |  |  | (12,625) |  |  | (9,382) |  |  | (14,962) |  |  | (6,231)
Net loss per share, basic and diluted |  |  | (0.08) |  |  | (0.06) |  |  | (0.09) |  |  | (0.04)
|  |  | Fiscal Year 2020
|  |  | December 31, |  |  | September 30, |  |  | June 30, |  |  | March 31,
Revenue |  | $ | 395 |  | $ | 639 |  | $ | 587 |  | $ | 1,469
Gross profit |  |  | 395 |  |  | 639 |  |  | 588 |  |  | 70
Net loss |  |  | (3,570) |  |  | (2,826) |  |  | (2,304) |  |  | (4,934)
Net loss per share, basic and diluted |  |  | (0.02) |  |  | (0.02) |  |  | (0.02) |  |  | (0.04)
|  |  | Fiscal Year 2019
|  |  | December 31, |  |  | September 30, |  |  | June 30, |  |  | March 31,
Revenue |  | $ | 4,605 |  | $ | 1,190 |  | $ | 1,240 |  | $ | 1,851
Gross profit |  |  | 1,179 |  |  | (882) |  |  | (583) |  |  | 608
Net loss |  |  | (3,284) |  |  | (6,141) |  |  | (8,990) |  |  | (8,068)
Net loss per share, basic and diluted |  |  | (0.03) |  |  | (0.05) |  |  | (0.08) |  |  | (0.08)
For the quarter ended December 31, 2019, net loss included a reversal of previously accrued bonuses in the amount of $770,000.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=124502072&loc=SL124452896-108306 + Details
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