Consolidated Statements of Cash Flows (Unaudited) - Scenario, Unspecified [Domain] - USD ($)	3 Months Ended
	Jun. 28, 2015	Jun. 29, 2014
Cash flows from operating activities:
Net income	$ 2,310,000	$ 4,071,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	339,000	346,000
Amortization of bond premium	68,000	$ 48,000
Amortization of debt discounts and issuance costs	297,000
Share-based compensation expense	203,000	$ 191,000
Provision for doubtful accounts	16,000
Deferred income taxes	35,000	$ 44,000
Changes in operating assets and liabilities:
Accounts and other receivables, net	$ (3,059,000)	(3,337,000)
Insurance proceeds received for business interruption claim		718,000
Inventories	$ (298,000)	(158,000)
Prepaid expenses and other current assets	3,172,000	2,440,000
Other assets	4,000	48,000
Accounts payable, accrued expenses and other current liabilities	3,635,000	(1,412,000)
Deferred franchise fees	98,000	85,000
Other liabilities	(204,000)	(65,000)
Net cash provided by operating activities	6,616,000	3,019,000
Cash flows from investing activities:
Proceeds from sale and maturities of available-for-sale securities	3,070,000	1,670,000
Purchase of property and equipment	(154,000)	$ (220,000)
Purchase of available-for-sale securities	(3,887,000)
Net cash (used in) provided by investing activities	(971,000)	$ 1,450,000
Cash flows from financing activities:
Income tax benefit on stock option exercises	65,000	294,000
Proceeds from exercise of stock options	44,000	$ 89,000
Dividends paid upon vesting of restricted stock	(125,000)
Payments of withholding tax on net share settlement of share-based compensation plans	(59,000)	$ (265,000)
Repurchase of treasury stock	(5,360,000)	(1,559,000)
Net cash (used in) financing activities	(5,435,000)	(1,441,000)
Net increase in cash and cash equivalents	210,000	3,028,000
Cash and cash equivalents, beginning of period	51,393,000	22,077,000
Cash and cash equivalents, end of period	51,603,000	25,105,000
Cash paid during the period for:
Interest	0	0
Income taxes (refunded) / paid	$ (1,453,000)	$ 36,000