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Shareholders' Equity (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
9 Months Ended | 12 Months Ended | 12 Months Ended | 0 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 29, 2012
|
Dec. 29, 2012
|
Dec. 31, 2011
|
Dec. 29, 2012
Common Stock [Member]
|
Dec. 31, 2011
Common Stock [Member]
|
Dec. 29, 2012
2011 Plan
|
Dec. 29, 2012
Stock options
|
Dec. 31, 2011
Stock options
|
Dec. 29, 2012
Stock options
Common Stock [Member]
|
Dec. 31, 2011
Stock options
Common Stock [Member]
|
Dec. 29, 2012
Stock options
2011 Plan
|
May 10, 2012
Stock options
2011 Plan
Employees
|
Aug. 02, 2012
Stock options
2011 Plan
Non-employee directors
|
May 10, 2012
Stock options
2011 Plan
Non-employee directors
|
Dec. 29, 2012
Stock options
2006 Plan
|
Dec. 29, 2012
Stock options
1997 Plan
|
|
| Shareholders' Equity | ||||||||||||||||
| Issuance of Common Stock (in Shares) | 29 | 34 | ||||||||||||||
| Issuance of Common Stock | $ 86 | $ 117 | $ 86 | $ 117 | ||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | $ 0 | $ 71 | $ 96 | |||||||||||||
| Maximum number of shares of common stock which can be issued | 700 | |||||||||||||||
| Vesting period | 2 years | 6 months | ||||||||||||||
| Options Outstanding | 533 | 588 | 52 | 473 | 8 | |||||||||||
| Granted (in shares) | 38 | 73 | 8 | 30 | ||||||||||||
| Granted, exercise price | $ 4.04 | $ 4.45 | $ 4.01 | $ 4.05 | ||||||||||||
| Weighted average grant date fair value (in dollars per share) | $ 3.56 | $ 3.86 | $ 3.52 | $ 3.57 | ||||||||||||
| Assumptions used to estimate the fair value of stock options granted | ||||||||||||||||
| Expected dividend yield (as a percent) | 0.00% | 0.00% | 0.00% | |||||||||||||
| Expected stock price volatility (as a percent) | 95.46% | 97.46% | ||||||||||||||
| Risk-free interest rate (as a percent) | 1.80% | 2.93% | ||||||||||||||
| Expected life of options (in years) | 10 years | 8 years 10 months 6 days | ||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | ||||||||||||||||
| Options Outstanding Balance | 588 | 552 | 52 | 473 | 8 | |||||||||||
| Granted (in shares) | 38 | 73 | 8 | 30 | ||||||||||||
| Exercised | (29) | (34) | ||||||||||||||
| Cancelled/expired | (59) | (3) | ||||||||||||||
| Forfeiture | (5) | |||||||||||||||
| Options Outstanding Balance | 533 | 588 | 52 | 473 | 8 | |||||||||||
| Weighted average exercise Price, balance | $ 3.99 | $ 3.87 | ||||||||||||||
| Granted, exercise price | $ 4.04 | $ 4.45 | $ 4.01 | $ 4.05 | ||||||||||||
| Exercisesd, exercise Price | $ 3.03 | $ 3.38 | ||||||||||||||
| Expired, exercise price | $ 5.25 | $ 4.76 | ||||||||||||||
| Forfeiture, exercise price | $ 4.25 | |||||||||||||||
| Weighted Average Exercise Price, balance | $ 3.88 | $ 3.99 | ||||||||||||||