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Significant Accounting Policies - EPS (Details) - $ / shares |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 19, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | May 31, 2017 | Dec. 31, 2016
Schedule of reconciliation of shares used to calculate basic and diluted earnings per share |  |  |  |  |  |  |
Weighted average shares outstanding used to compute basic earnings per share |  | 10,680,000 | 10,610,000 | 10,655,000 | 10,603,000 |  |
Incremental shares issuable upon the assumed exercise of stock options |  | 41,000 |  | 38,000 |  |  |
Unvested restricted stock |  | 469,000 | 189,000 | 462,000 | 187,000 |  |
Shares used to compute diluted earnings per share |  | 11,190,000 | 10,799,000 | 11,155,000 | 10,790,000 |  |
Common stock, shares authorized |  | 20,000,000 |  | 20,000,000 |  |  | 20,000,000
Common stock, par value |  | $ 0.01 |  | $ 0.01 |  |  | $ 0.01
Common stock, shares issued |  | 11,167,425 |  | 11,167,425 |  |  | 11,093,489
Common stock, shares outstanding |  | 11,167,425 |  | 11,167,425 |  |  | 11,093,489
Preferred stock, shares authorized |  | 8,000,000 |  | 8,000,000 |  |  | 8,000,000
Preferred stock, shares issued |  | 0 |  | 0 |  |  | 0
Preferred stock, shares outstanding |  | 0 |  | 0 |  |  | 0
Dividends declared, per share |  |  |  |  |  | $ 0.25 |
Dividends paid, per share | $ 0.25 |  |  |  |  |  |

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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1500-109256 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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