|
Stock-Based Compensation (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
|
1 Months Ended |
3 Months Ended |
9 Months Ended |
|
Jul. 31, 2007
|
Sep. 29, 2012
|
Oct. 01, 2011
|
Sep. 29, 2012
|
Oct. 01, 2011
|
| Stock-Based Compensation |
|
|
|
|
|
| Maximum term of options granted |
10 years |
|
|
|
|
| Shares of common stock originally reserved for issuance |
2,000,000 |
|
|
|
|
| Assumptions used in the Black-Scholes option-pricing model |
|
|
|
|
|
| Total stock-based compensation |
|
$ 145 |
$ 123 |
$ 457 |
$ 310 |
|
Cost of sales
|
|
|
|
|
|
| Assumptions used in the Black-Scholes option-pricing model |
|
|
|
|
|
| Total stock-based compensation |
|
12 |
12 |
41 |
33 |
|
Research and development
|
|
|
|
|
|
| Assumptions used in the Black-Scholes option-pricing model |
|
|
|
|
|
| Total stock-based compensation |
|
42 |
28 |
108 |
72 |
|
Selling, general and administrative
|
|
|
|
|
|
| Assumptions used in the Black-Scholes option-pricing model |
|
|
|
|
|
| Total stock-based compensation |
|
$ 91 |
$ 83 |
$ 308 |
$ 205 |
|
Stock option
|
|
|
|
|
|
| Shares Under Option |
|
|
|
|
|
| Options outstanding at the beginning of the period (in shares) |
|
|
|
1,261,000 |
|
| Granted (in shares) |
|
|
|
15,000 |
|
| Cancelled (in shares) |
|
|
|
(90,000) |
|
| Options outstanding at the end of the period (in shares) |
|
1,186,000 |
|
1,186,000 |
|
| Weighted Average Exercise Price |
|
|
|
|
|
| Options outstanding at the beginning of the period (in dollars per share) |
|
|
|
$ 3.73 |
|
| Granted (in dollars per share) |
|
|
|
$ 1.00 |
|
| Cancelled (in dollars per share) |
|
|
|
$ 4.23 |
|
| Options outstanding at the end of the period (in dollars per shares) |
|
$ 3.66 |
|
$ 3.66 |
|
| Assumptions used in the Black-Scholes option-pricing model |
|
|
|
|
|
| Risk free interest rate (as a percent) |
|
|
|
0.92% |
|
| Dividend yield (as a percent) |
|
|
|
0.00% |
|
| Expected volatility (as a percent) |
|
|
|
57.00% |
|
| Expected term |
|
|
|
6 years 3 months |
|
| Weighted average grant date fair value (in dollars per share) |
|
|
|
$ 0.54 |
|
|
Stock option | Employees
|
|
|
|
|
|
| Stock-Based Compensation |
|
|
|
|
|
| Options granted, vesting period |
|
|
|
4 years |
|
| Vesting of awards per year (as a percent) |
|
|
|
25.00% |
|
|
Stock option | Non-employees
|
|
|
|
|
|
| Stock-Based Compensation |
|
|
|
|
|
| Options granted, vesting period |
|
|
|
3 years |
|
| Vesting of awards per year (as a percent) |
|
|
|
25.00% |
|
| Options granted, vesting percentage upon grant (as a percent) |
|
|
|
25.00% |
|