Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 10,263		$ 2,150	$ 7,432	$ 5,454
Accounts receivable (less allowance for doubtful accounts of $1,135 and $868 at December 31, 2018 and 2017, respectively)	67,819		74,064
Contract assets	86,665	$ 68,739	0
Inventories	101,125	83,159	122,161
Production cost of contracts	11,679		11,204
Other current assets	9,839		11,435
Total Current Assets	287,390		221,014
Property and Equipment, Net	107,045		110,252
Goodwill	136,057		117,435
Intangibles, Net	112,092		114,693
Non-Current Deferred Income Taxes	308	166	261
Other Assets	5,251		3,098
Total Assets	648,143		566,753
Current Liabilities
Accounts payable	69,274		51,907
Contract liabilities	17,145	24,460	0
Accrued liabilities	37,786	22,238	28,329
Current portion of long-term debt	2,330		0
Total Current Liabilities	126,535		80,236
Long-Term Debt, Less Current Portion	226,961		216,055
Non-Current Deferred Income Taxes	18,070	18,589	15,981
Other Long-Term Liabilities	19,752		18,898
Total Liabilities	391,318		331,170
Commitments and Contingencies (Notes 13, 16)
Shareholders’ Equity
Common stock - $0.01 par value; 35,000,000 shares authorized; 11,417,863 and 11,332,841 shares issued and outstanding at December 31, 2018 and 2017, respectively	114		113
Additional paid-in capital	83,712		80,223
Retained earnings	180,356	$ 170,029	161,364
Accumulated other comprehensive loss	(7,357)		(6,117)
Total Shareholders’ Equity	256,825		235,583	$ 212,103	$ 185,734
Total Liabilities and Shareholders’ Equity	$ 648,143		$ 566,753