Note 6 - Fair Value of Assets and Liabilities (Tables)

3 Months Ended

Mar. 28, 2015

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Investment in Polytronics	$	12,862	$	—	$	—	$	12,862
Total	$	12,862	$	—	$	—	$	12,862

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Investment in Polytronics	$	12,056	$	—	$	—	$	12,056
Total	$	12,056	$	—	$	—	$	12,056