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Stock-Based Compensation (Details) - USD ($) |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended |
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Nov. 12, 2020 | Nov. 10, 2020 | Nov. 15, 2018 | Feb. 02, 2018 | Feb. 16, 2017 | Sep. 27, 2010 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Nov. 21, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock issued under employee stock purchase plan (in shares) |  |  |  |  |  |  |  |  | 36,000 | 27,000 |
Stock based compensation reflected in additional paid in capital |  |  |  |  |  |  | $ 800,000 | $ 800,000 | $ 1,400,000 | $ 1,400,000 |
2007 Long-Term Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  | 1,400,000
2010 Long-Term Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  | 475,000 |  | 1,000,000 |  |  |  |  |
Contractual term of stock options granted |  |  |  |  |  | 10 years |  |  |  |  |
2017 Long-Term Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  |  | 4,000,000 |  | 4,000,000 |  |
Number of additional shares authorized (in shares) | 650,000 | 1,052,000 | 715,000 | 425,000 | 650,000 |  |  |  |  |  |
Right to purchase common stock, non-vested and outstanding, exercise price (in USD per share) |  |  |  |  |  |  | $ 4.44 |  | $ 4.44 |  |
Share based payment award, vesting period |  |  |  |  |  |  |  |  | 3 years |  |
Options outstanding, net of awards expired (in shares) |  |  |  |  |  |  | 100,000 |  | 100,000 |  |
2017 Long-Term Incentive Plan Excluding 2010 Long-Term Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  | 3,492,000 |  |  |  |  |  |  |
Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common Stock, capital shares reserved for future issuance (in shares) |  |  |  |  |  |  | 400,000 |  | 400,000 |  |
Shares available for issuance under the ESPP (in shares) |  |  |  |  |  |  | 200,000 |  | 200,000 |  |
Purchase price of common stock (as a percent) |  |  |  |  |  |  |  |  | 85.00% |  |
Maximum employee subscription rate (as a percent) |  |  |  |  |  |  | 15.00% |  | 15.00% |  |
Maximum number of shares per employee (in shares) |  |  |  |  |  |  |  |  | 3,000 |  |
Amount in excess of fair market value of stock for option not to be granted |  |  |  |  |  |  | $ 25,000 |  | $ 25,000 |  |
Offering period |  |  |  |  |  |  |  |  | 6 months |  |

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- Definition Amount of increase to additional paid-in capital (APIC) for recognition of cost for option under share-based payment arrangement. + References No definition available. + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. + 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 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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