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Stockholders' Equity (Details) (USD $) | 0 Months Ended | 3 Months Ended
--- | --- | ---
Jul. 22, 2013 | Jun. 28, 2014 | Jun. 29, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance, common stock, shares |  | 8,844,824 |  |
Beginning balance |  | $ 290,433,000 |  |
Stock option exercises, shares | 1,867,370 |  |  |
Stock option exercises, amount |  | 241,000 |  |
Stock-based compensation |  | 282,000 |  |
Net income |  | 5,759,000 |  | 1,826,000
Other comprehensive loss |  | 168,000 |  |
Ending balance, common stock, shares |  | 8,849,824 |  |
Ending balance |  | 296,883,000 |  |
Pre-tax unrealized loss on available-for-sale investments |  | 259,000 |  |
Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance, common stock, shares |  | 8,844,824 |  |
Beginning balance |  | 88,000 |  |
Stock option exercises, shares |  | 5,000 |  |
Stock option exercises, amount |  | 0 |  |
Stock-based compensation |  | 0 |  |
Net income |  | 0 |  |
Other comprehensive loss |  | 0 |  |
Ending balance, common stock, shares |  | 8,849,824 |  |
Ending balance |  | 88,000 |  |
Additional paid-in capital |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  | 232,081,000 |  |
Stock option exercises, amount |  | 241,000 |  |
Stock-based compensation |  | 282,000 |  |
Net income |  | 0 |  |
Other comprehensive loss |  | 0 |  |
Ending balance |  | 232,604,000 |  |
Retained earnings |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  | 57,828,000 |  |
Stock option exercises, amount |  | 0 |  |
Stock-based compensation |  | 0 |  |
Net income |  | 5,759,000 |  |
Other comprehensive loss |  | 0 |  |
Ending balance |  | 63,587,000 |  |
Accumulated other comprehensive income |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  | 436,000 |  |
Stock option exercises, amount |  | 0 |  |
Stock-based compensation |  | 0 |  |
Net income |  | 0 |  |
Other comprehensive loss |  | 168,000 | [1] |
Ending balance |  | $ 604,000 |  |
[1] | Other comprehensive income is comprised of unrealized gains and losses on available-for-sale investments. Unrealized gains before tax on available-for-sale investments were $259,000 for the three months ended June 28, 2014.

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