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Stock-Based Compensation (Details) |  |  |  |  |  | 3 Months Ended | 6 Months Ended
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Nov. 12, 2020 shares | Nov. 15, 2018 shares | Feb. 02, 2018 shares | Sep. 27, 2010 $ / shares shares | Nov. 21, 2006 $ / shares shares | Dec. 31, 2020 USD ($) installment $ / shares shares | Sep. 30, 2020 shares | Dec. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) installment $ / shares shares | Dec. 31, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock issued under employee stock purchase plan (in shares) |  |  |  |  |  |  | 23,000 |  |  |
Stock based compensation reflected in additional paid in capital | $ |  |  |  |  |  | $ 1,000,000.0 |  | $ 1,400,000 | $ 1,500,000 | $ 2,700,000
Increase in share-based compensation included in other accrued expenses | $ |  |  |  |  |  | $ 17,000 |  | $ 100,000 | $ 100,000 | $ 200,000
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 |  |  |  |  |
Right to purchase common stock, minimum price per share (USD per share) | $ / shares |  |  |  |  | $ 4.41 |  |  |  |  |
Right to purchase common stock, maximum price per share (USD per share) | $ / shares |  |  |  |  | $ 10.50 |  |  |  |  |
Contractual term of stock options granted |  |  |  |  | 10 years |  |  |  |  |
Options outstanding, net of awards expired (in shares) |  |  |  |  |  | 17,000 |  |  | 17,000 |
2007 Long-Term Incentive Plan | Minimum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share based payment award, vesting period |  |  |  |  | 1 year |  |  |  |  |
2007 Long-Term Incentive Plan | Maximum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share based payment award, vesting period |  |  |  |  | 3 years |  |  |  |  |
2010 Long-Term Incentive Plan |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  | 475,000 | 1,000,000.0 |  |  |  |  |  |
Right to purchase common stock, minimum price per share (USD per share) | $ / shares |  |  |  | $ 9.31 |  |  |  |  |  |
Right to purchase common stock, maximum price per share (USD per share) | $ / shares |  |  |  | $ 20.09 |  |  |  |  |  |
Contractual term of stock options granted |  |  |  | 10 years |  |  |  |  |  |
Options outstanding, net of awards expired (in shares) |  |  |  |  |  | 27,000 |  |  | 27,000 |
2010 Long-Term Incentive Plan | Minimum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share based payment award, vesting period |  |  |  | 1 year |  |  |  |  |  |
2010 Long-Term Incentive Plan | Maximum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share based payment award, vesting period |  |  |  | 4 years |  |  |  |  |  |
2017 Long-Term Incentive Plan |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  | 2,900,000 |  |  | 2,900,000 |
Share based payment award, vesting period |  |  |  |  |  |  |  |  | 3 years |
Options outstanding, net of awards expired (in shares) |  |  |  |  |  | 200,000 |  |  | 200,000 |
Number of additional shares authorized (in shares) | 650,000 | 715,000 | 425,000 |  |  |  |  |  |  |
Right to purchase common stock, non-vested and outstanding, exercise price (USD per share) | $ / shares |  |  |  |  |  | $ 4.44 |  |  | $ 4.44 |
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) |  |  | 2,440,000 |  |  |  |  |  |  |
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) |  |  |  |  |  | 300,000 |  |  | 300,000 |
Purchase price of common stock (in percentage) |  |  |  |  |  |  |  |  | 85.00% |
Maximum employee subscription rate (in percentage) |  |  |  |  |  | 15.00% |  |  | 15.00% |
Maximum number of shares per employee |  |  |  |  |  |  |  |  | 3,000 |
Amount in excess of fair market value of stock for option not to be granted | $ |  |  |  |  |  | $ 25,000 |  |  | $ 25,000 |
Common stock issued under employee stock purchase plan (in shares) |  |  |  |  |  |  |  |  | 23,000 |
Performance Shares | 2017 Performance Plan |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share based payment award, vesting period |  |  |  |  |  |  |  |  | 3 years |
Shares issued (in shares) |  |  |  |  |  |  |  |  | 0 |
Number of vesting installments | installment |  |  |  |  |  | 3 |  |  | 3 |

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 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 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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