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Stockholders' Equity (Details) (USD $) | 0 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 22, 2013 | Sep. 27, 2014 | Sep. 28, 2013 | Sep. 27, 2014 | Sep. 28, 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 |  |  |  | 3,357,000 |  |
Stock-based compensation |  |  |  | 1,114,000 |  |
Net income |  | 5,467,000 | 4,310,000 | 11,226,000 |  | 6,136,000
Other comprehensive loss |  |  |  | 66,000 | [1] |
Ending balance, common stock, shares |  | 8,857,449 |  | 8,857,449 |  |
Ending balance |  | 306,196,000 |  | 306,196,000 |  |
Pre-tax unrealized loss on available-for-sale investments |  |  |  | 106,000 |  |
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 |  |  |  | 12,625 |  |
Stock option exercises, amount |  |  |  | 1,000 |  |
Stock-based compensation |  |  |  | 0 |  |
Net income |  |  |  | 0 |  |
Other comprehensive loss |  |  |  | 0 |  |
Ending balance, common stock, shares |  | 8,857,449 |  | 8,857,449 |  |
Ending balance |  | 89,000 |  | 89,000 |  |
Additional paid-in capital |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | 232,081,000 |  |
Stock option exercises, amount |  |  |  | 3,356,000 |  |
Stock-based compensation |  |  |  | 1,114,000 |  |
Net income |  |  |  | 0 |  |
Other comprehensive loss |  |  |  | 0 |  |
Ending balance |  | 236,551,000 |  | 236,551,000 |  |
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 |  |  |  | 11,226,000 |  |
Other comprehensive loss |  |  |  | 0 |  |
Ending balance |  | 69,054,000 |  | 69,054,000 |  |
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 |  |  |  | 66,000 | [1] |
Ending balance |  | $ 502,000 |  | $ 502,000 |  |
[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 $106,000 for the six months ended September 27, 2014.

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