Debt - $110.0 million Credit Agreement (Details)		6 Months Ended
	May. 14, 2014 USD ($)	Jun. 28, 2015 USD ($)	May. 31, 2015 USD ($)
Herley
Line of Credit Facility [Line Items]
Collateral value		$ 50,200,000
Fixed charge coverage ratio of at least 1.05 | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Fixed charge coverage ratio			1.05
Herley disposition proceeds reinvestment reserve, as defined in the amendment | 2014 Credit Agreement, Third Amendment | Minimum
Line of Credit Facility [Line Items]
Covenant Terms, percentage of reinvestment in excess of loans and credit			0.00%
Herley disposition proceeds reinvestment reserve, as defined in the amendment | 2014 Credit Agreement, Third Amendment | Maximum
Line of Credit Facility [Line Items]
Covenant Terms, percentage of reinvestment in excess of loans and credit			15.00%
Fixed charge coverage ratio of at least 1.10 | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Fixed charge coverage ratio			1.10
Fixed charge coverage ratio of at least 1.10 | 2014 Credit Agreement, Third Amendment | Minimum
Line of Credit Facility [Line Items]
Covenant Terms, percentage of reinvestment in excess of loans and credit			15.00%
Fixed charge coverage ratio of at least 1.10 | 2014 Credit Agreement, Third Amendment | Maximum
Line of Credit Facility [Line Items]
Covenant Terms, percentage of reinvestment in excess of loans and credit			25.00%
Fixed charge coverage ratio remains at 1.15 | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Fixed charge coverage ratio			1.15
Revolving Loans
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 110,000,000.0
Maturity period	5 years
Potential maximum borrowing capacity, subject to Lender approval	$ 135,000,000.0
Fixed charge coverage ratio		1.15
Outstanding borrowings		$ 41,000,000
Remaining borrowing capacity		$ 32,900,000
Revolving Loans | Maximum | Herley
Line of Credit Facility [Line Items]
Period from sale allowed to reinvest in similar collateral assets		360 days
Revolving Loans | Federal Funds rate
Line of Credit Facility [Line Items]
Base rate (the greater of prime rate or 0.5% over federal funds rate)		0.50%
Revolving Loans | LIBOR rate
Line of Credit Facility [Line Items]
Base rate (floor, 1.0% over one-month LIBOR)		1.00%
Revolving Loans | Base rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.50%
Revolving Loans | Base rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.00%
Revolving Loans | Eurodollar rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.50%
Revolving Loans | Eurodollar rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		3.00%
Revolving Loans | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Fixed charge coverage ratio		1.15
Revolving Loans | 2014 Credit Agreement, Third Amendment | Minimum | Herley
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Compliance, Required Amount of Loan Repurchased			$ 175,000,000
Revolving Loans | Fixed charge coverage ratio not measured | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Covenant Terms, capacity of outstanding loans or credit			0
Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	50,000,000.0
Outstanding borrowings		$ 12,000,000
Letter of Credit | Fixed charge coverage ratio not measured | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Covenant Terms, capacity of outstanding loans or credit			17,000,000
Swingline Loan
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 10,000,000.0
Swingline Loan | Fixed charge coverage ratio not measured | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Covenant Terms, capacity of outstanding loans or credit			0
Revolving Loans plus outstanding Swingline Loans plus Letters of Credit | Fixed charge coverage ratio of at least 1.05 | 2014 Credit Agreement, Third Amendment
Line of Credit Facility [Line Items]
Covenant Terms, capacity of outstanding loans or credit			$ 17,000,000