Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 3,727	$ 10,263
Accounts receivable, net of allowance for doubtful accounts of $1,239 and $1,135 at March 30, 2019 and December 31, 2018, respectively	63,134	67,819
Contract assets	93,306	86,665
Inventories	103,994	101,125
Production cost of contracts	11,008	11,679
Other current assets	7,003	6,531
Total Current Assets	282,172	284,082
Property and equipment, net of accumulated depreciation of $158,308 and $154,840 at March 30, 2019 and December 31, 2018, respectively	108,839	107,045
Operating lease right-of-use assets	18,398
Goodwill	136,057	136,057
Intangibles, net	109,387	112,092
Non-current deferred income taxes	313	308
Other assets	5,543	5,155
Total Assets	660,709	644,739
Current Liabilities
Accounts payable	68,785	69,274
Contract liabilities	15,030	17,145
Accrued and other liabilities	28,986	37,786
Operating lease liabilities	2,536	0
Current portion of long-term debt	2,330	2,330
Total Current Liabilities	117,667	126,535
Long-term debt	229,125	228,868
Non-current operating lease liabilities	17,499
Non-current deferred income taxes	18,211	18,070
Other long-term liabilities	14,429	14,441
Total Liabilities	396,931	387,914
Commitments and contingencies (Notes 10, 12)
Shareholders’ Equity
Common stock - $0.01 par value; 35,000,000 shares authorized; 11,477,771 and 11,417,863 shares issued and outstanding at March 30, 2019 and December 31, 2018, respectively	115	114
Additional paid-in capital	83,370	83,712
Retained earnings	187,564	180,356
Accumulated other comprehensive loss	(7,271)	(7,357)
Total Shareholders’ Equity	263,778	256,825
Total Liabilities and Shareholders’ Equity	$ 660,709	$ 644,739