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Net Income Per Share | 6 Months Ended
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Jun. 30, 2019
Net Income Per Share | 5.  Net Income Per Share ​ Basic net income per share is computed by dividing net income by the weighted average number of Company shares outstanding during the period. Diluted net income per share reflects the potential dilution that could occur if securities or other contracts to issue shares were exercised or converted into shares. There were no potential dilutive shares outstanding at each of June 30, 2019 and 2018.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration