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Stock-based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 6 Months Ended
--- | --- | --- | ---
Mar. 30, 2021 | Jun. 01, 2018 | Jun. 30, 2022 | Jun. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Options to purchase, Granted (in shares) |  |  | 135,000 |
Options cancelled to purchase common stock |  |  | 44,375 |
Stock-based compensation expense |  |  | $ 214 | $ 211
Restricted common stock granted | 25,000 |  |  |
Restricted common stock granted | 25,000 |  |  |
David Ludwig And Tom Ludwig [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Restricted common stock granted |  | 600,000 |  |
Restricted common stock granted |  | 600,000 |  |
Common Stock Options [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  |  | 200 |
Unrecognized stock-based compensation |  |  | $ 1,100 |
Unrecognized stock-based compensation, Period for recognition |  |  | 2 years 10 months 24 days |
Restricted Stock [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  |  | $ 25,800 |
Shares restriction term of service | 2 years |  |  |
Weighted average grant date fair value |  |  | $ 0.43 |
Unrecognized stock-based compensation expense |  |  | $ 47,300 |
Restricted Stock [Member] | David Ludwig And Tom Ludwig [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares restriction term of service |  | 5 years |  |
Equity Incentive Plan [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Common stock shares authorized for issuance under plan |  |  | 3,500,000 |
Employees [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Options to purchase, Granted (in shares) |  |  | 13,500 |
Employees [Member] | Equity Incentive Plan [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock issued during the period under employee stock purchase plan |  |  | 0 |
Directors [Member] | Equity Incentive Plan [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock issued during the period under employee stock purchase plan |  |  | 0 |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of cost to be recognized for option under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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