|
Acquisition, Goodwill Impairment and Long-lived Asset Impairment (Details Textual) (USD $)
|
3 Months Ended | 12 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2012
|
Dec. 29, 2012
|
Dec. 31, 2010
|
Dec. 31, 2011
|
Dec. 29, 2012
Nanda [Member]
|
Dec. 31, 2011
Nanda [Member]
|
Jan. 01, 2011
Nanda [Member]
|
Nov. 21, 2011
Nanda [Member]
|
Nov. 21, 2011
Developed technology [Member]
Nanda [Member]
|
Nov. 21, 2011
Customer relationships [Member]
Nanda [Member]
|
Dec. 29, 2012
In-process research and development [Member]
Nanda [Member]
|
Nov. 21, 2011
In-process research and development [Member]
Nanda [Member]
|
Dec. 29, 2012
Maximum [Member]
|
Dec. 29, 2012
Maximum [Member]
Developed technology [Member]
|
Dec. 29, 2012
Maximum [Member]
Customer relationships [Member]
|
Dec. 29, 2012
Real Time Metrology Inc. (RTM) [Member]
|
Dec. 29, 2012
Real Time Metrology Inc. (RTM) [Member]
Nanda [Member]
|
Nov. 21, 2011
Real Time Metrology Inc. (RTM) [Member]
Nanda [Member]
|
|
| Acquisition Goodwill Impairment and Long Lived Asset Impairment (Textual) [Abstract] | ||||||||||||||||||
| Preliminary purchase price allocation period | 1 year | |||||||||||||||||
| Reduction in fair value of royalty payments | $ 600,000 | $ 600,000 | ||||||||||||||||
| Reduction in fair value of goodwill | 400,000 | 500,000 | 400,000 | |||||||||||||||
| Reduction in fair value of intangible assets | 200,000 | 200,000 | ||||||||||||||||
| Proceeds from escrow | 500,000 | |||||||||||||||||
| Acquired percentage of the outstanding shares of Nanda Technologies GmbH | 100.00% | |||||||||||||||||
| Net purchase price in cash | 24,600,000 | |||||||||||||||||
| Goodwill | 11,352,000 | 11,990,000 | 11,400,000 | |||||||||||||||
| Intangibles aquired | 9,042,000 | 1,040,000 | 300,000 | 308,000 | ||||||||||||||
| Finite-lived intangibles estimated lives | 5 years | 3 years | 10 years | 10 years | 10 years | |||||||||||||
| Goodwill acquired | 11,610,000 | |||||||||||||||||
| Royalty payments to be remitted for the first three years subsequent to the acquisition | 100.00% | |||||||||||||||||
| Royalty payments to be remitted subsequent to the first three years after the acquisition | 50.00% | |||||||||||||||||
| Contingent liabilities | 600,000 | |||||||||||||||||
| Pro forma adjustments, amortization | 2,400,000 | 2,600,000 | ||||||||||||||||
| Pro forma adjustments, stock-based compensation | 800,000 | 1,900,000 | ||||||||||||||||
| Impairment of intangible assets | $ 500,000 | |||||||||||||||||