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Streamlining and Restructuring Charges (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2012 | Jun. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Number of positions eliminated |  |  |  |  | 84 |  |  |  |
Number of positions eliminated (in hundredths) |  |  |  |  | 34.00% |  |  |  |
Number of positions eliminated immediately |  |  |  |  | 52 |  |  |  |
Restructuring charges related to manufacturing operations | $ 800,000 |  |  |  |  |  |  |  |
Number of leased buildings expected to be vacated |  |  |  |  | 2 |  |  |  |
Recorded accelerated depreciation |  |  | 1,300,000 |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |
Balance beginning | 162,000 |  | 162,000 |  | 162,000 |  | 243,000 |  |
Restructuring charges |  |  |  |  | 5,074,000 |  | 0 |  | 82,000
Cash payments |  |  |  |  | (2,716,000) |  | (113,000) |  |
Proceeds from sale of assets |  |  |  |  | 461,000 |  |  |  |
Adjustments |  |  |  |  | (2,906,000) |  | 32,000 |  |
Balance, ending |  |  |  |  | 75,000 |  | 162,000 |  | 243,000
Employee Severance and Other Benefits [Member] |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |
Balance beginning | 0 |  | 0 |  | 0 |  | 0 |  |
Restructuring charges |  |  |  |  | 2,027,000 |  | 0 |  |
Cash payments |  |  |  |  | (2,027,000) |  | 0 |  |
Proceeds from sale of assets |  |  |  |  | 0 |  |  |  |
Adjustments |  |  |  |  | 0 |  | 0 |  |
Balance, ending |  |  |  |  | 0 |  | 0 |  |
Facility Closing [Member] |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |
Balance beginning | 162,000 | [1] | 162,000 | [1] | 162,000 | [1] | 243,000 | [1] |
Restructuring charges |  |  |  |  | 587,000 | [1] | 0 | [1] |
Cash payments |  |  |  |  | (689,000) | [1] | (113,000) | [1] |
Proceeds from sale of assets |  |  |  |  | 0 | [1] |  |  |
Adjustments |  |  |  |  | 15,000 | [1] | 32,000 | [1] |
Balance, ending |  |  |  |  | 75,000 | [1] | 162,000 | [1] |
Sale of Assets [Member] |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | 400,000 |  |  |  |
Asset Impairment and Accelerated Depreciation [Member] |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |
Balance beginning | 0 | [2] | 0 | [2] | 0 | [2] | 0 | [2] |
Restructuring charges |  |  |  |  | 2,460,000 | [2] | 0 | [2] |
Cash payments |  |  |  |  | 0 | [2] | 0 | [2] |
Proceeds from sale of assets |  |  |  |  | 461,000 | [2] |  |  |
Adjustments |  |  |  |  | (2,921,000) | [2] | 0 | [2] |
Balance, ending |  |  |  |  | $ 0 | [2] | $ 0 | [2] |
[1] | Includes moving and relocation costs, and lease payments offset by sublease payments.
[2] | Restructuring charges include non-cash impairments and accelerated depreciation of property and equipment and leasehold improvements; however, these amounts are not included in the restructuring accrual.

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