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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Current Assets |  |
Accounts receivable, allowance for doubtful accounts | $ 1,836 | $ 941
Stockholders' Equity: |  |
Preferred stock, par value (in dollars per share) | $ 0 | $ 0
Preferred stock, authorized (in shares) | 1,000,000 | 1,000,000
Preferred stock, issued (in shares) | 0 | 0
Class A [Member] |  |
Stockholders' Equity: |  |
Common stock, par value (in dollars per share) | $ 0.10 | $ 0.10
Common stock, authorized (in shares) | 10,000,000 | 10,000,000
Common stock, outstanding (in shares) | 2,174,912 | 2,174,912
Common stock, treasury shares (in shares) | 1,072,769 | 1,072,769
Class B [Member] |  |
Stockholders' Equity: |  |
Common stock, par value (in dollars per share) | $ 0.10 | $ 0.10
Common stock, authorized (in shares) | 30,000,000 | 30,000,000
Common stock, outstanding (in shares) | 9,704,877 | 9,335,677
Common stock, treasury shares (in shares) | 3,218,307 | 3,218,307

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