XML 34 R19.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Earnings Per Share | 12 Months Ended
--- | ---
Dec. 31, 2017
Earnings Per Share [Abstract] |
Earnings Per Share | 12. Earnings Per Share The calculation of earnings per share follows:
|  | 2017 |  | 2016
Numerator: |  |  |  |  |  |  |  |
Net income |  | $ | 4,052,479 |  |  | $ | 5,850,998 |
Denominator: |  |  |  |  |  |  |  |
Denominator for basic earnings per share: |  |  |  |  |  |  |  |
Weighted average shares outstanding |  |  | 3,356,383 |  |  |  | 3,327,867 |
Effect of dilutive employee stock options |  |  | 368,220 |  |  |  | 249,956 |
Denominator for dilutive earnings per share |  |  | 3,724,603 |  |  |  | 3,577,823 |
Basic earnings per share |  | $ | 1.21 |  |  | $ | 1.76 |
Dilutive earnings per share |  | $ | 1.09 |  |  | $ | 1.64 |
For 2017 and 2016, respectively, 205,500 and 203,000 stock options were excluded from diluted earnings per share calculations because they would have been anti-dilutive.

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
Name: | us-gaap_EarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration