Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Cash Flows from Operating Activities
Net Income	$ 13,020	$ 15,287
Net Cash Provided by Operating Activities:
Depreciation and amortization	14,663	13,759
Non-cash operating lease cost	1,554	1,373
Stock-based compensation expense	4,529	3,271
Deferred income taxes	2,087	181
Recovery of credit losses	(3)	(391)
Other	388	(297)
Changes in Assets and Liabilities:
Accounts receivable	(382)	(1,145)
Contract assets	(16,207)	(13,862)
Inventories	(16,127)	(8,202)
Production cost of contracts	1,014	(1,161)
Other assets	1,139	473
Accounts payable	(14,063)	7,158
Contract liabilities	12,565	(3,962)
Operating lease liabilities	(1,391)	(1,329)
Accrued and other liabilities	(6,176)	(3,103)
Net Cash (Used in) Provided by Operating Activities	(3,390)	8,050
Cash Flows from Investing Activities
Purchases of property and equipment	(5,002)	(7,566)
Post closing cash received from the acquisition of Nobles Worldwide, Inc., net	190	0
Net Cash Used in Investing Activities	(4,812)	(7,566)
Cash Flows from Financing Activities
Borrowings from senior secured revolving credit facility	65,900	106,800
Repayments of senior secured revolving credit facility	(15,900)	(104,300)
Repayments of term loans	(9,112)	(6,000)
Repayments of other debt	(160)	(65)
Net cash paid upon issuance of common stock under stock plans	(1,282)	(3,138)
Net Cash Provided by (Used in) Financing Activities	39,446	(6,703)
Net Increase (Decrease) in Cash and Cash Equivalents	31,244	(6,219)
Cash and Cash Equivalents at Beginning of Period	39,584	10,263
Cash and Cash Equivalents at End of Period	$ 70,828	$ 4,044