Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Cash Flows from Operating Activities
Net Income	$ 2,115	$ 13,550
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation and amortization	5,782	5,855
Gain on divestitures	0	(18,815)
Stock-based compensation expense	1,822	1,000
Deferred income taxes	532	(2,562)
Provision for (recovery of) doubtful accounts	26	(65)
Other	(1,860)	(1,370)
Changes in Assets and Liabilities:
Accounts receivable	4,590	1,972
Inventories	(7,305)	(12,366)
Production cost of contracts	45	429
Other assets	610	7,084
Accounts payable	6,465	7,303
Accrued and other liabilities	415	3,437
Net Cash Provided by Operating Activities	13,237	5,452
Cash Flows from Investing Activities
Purchases of property and equipment	(6,797)	(3,801)
Proceeds from sale of assets	3	0
Proceeds from divestitures	0	55,272
Net Cash (Used in) Provided by Investing Activities	(6,794)	51,471
Cash Flows from Financing Activities
Borrowings from senior secured revolving credit facility	55,600	0
Repayments of senior secured revolving credit facility	(55,600)	0
Repayments of senior unsecured notes and term loans	(5,000)	(55,000)
Repayments of other debt	(3)	(7)
Net (cash paid) proceeds from issuance of common stock under stock plans	(1,758)	(931)
Net Cash Used in Financing Activities	(6,761)	(55,938)
Net (Decrease) Increase in Cash and Cash Equivalents	(318)	985
Cash and Cash Equivalents at Beginning of Period	7,432	5,454
Cash and Cash Equivalents at End of Period	$ 7,114	$ 6,439