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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified |
Mar. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Accounts receivable, allowance for doubtful accounts | $ 273 | $ 236 |
| Inventory, provision | $ 568 | $ 578 |
| Preferred stock, no par value | ||
| Preferred stock, shares authorized | 3,000 | 3,000 |
| Preferred stock, shares issued | 0 | 0 |
| Treasury stock, shares | 1,562 | 1,562 |
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Class A Common Stock [Member]
|
||
| Common stock, no par value | ||
| Common stock, shares authorized | 30,000 | 30,000 |
| Common stock, shares issued | 16,881 | 16,691 |
| Common stock, shares outstanding | 15,320 | 15,143 |
|
Class B Common Stock [Member]
|
||
| Common stock, no par value | ||
| Common stock, shares authorized | 5,000 | 5,000 |
| Common stock, shares issued | 0 | 0 |