INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current deferred tax assets (liabilities):
Accrued vacation	$ 705	$ 663
Inventories	1,888	1,803
Stock award	522	962
Obligation under operating leases	587	437
Foreign NOL carryforwards	261	0
Other	137	220
Total current deferred tax assets	4,100	4,085
Less: valuation allowance	(261)	0
Deferred Tax Assets, Net of Valuation Allowance, Current, Total	3,839	4,085
Long-term deferred tax assets (liabilities):
Depreciation	(6,151)	(5,755)
Amortization of intangibles	(3,646)	(4,180)
Gain on sale of real estate	1,022	1,106
Long-term contract costs	(1,941)	(886)
Professional fees	1,946	86
Other	38	710
Total long-term deferred tax liabilities	(8,732)	(8,919)
Net deferred tax liabilities	(4,893)	(4,834)
Federal [Abstract]
Current	7,926	5,658	5,306
Deferred	(109)	1,149	(151)
Federal Income Tax Expense, Total	7,817	6,807	5,155
State [Abstract]
Current	346	225	355
Deferred	(10)	104	(14)
State Income Tax Expense, Total	336	329	341
Provision for income taxes	8,153	7,136	5,496
Income Tax Reconciliation [Abstract]
Federal taxes	8,627	8,235	6,449
State and local taxes, net of federal benefit	336	329	341
Production deduction	(530)	(508)	(399)
Research and experimental and other tax credits	(300)	(665)	(470)
Other	20	(255)	(425)
Provision for income taxes	$ 8,153	$ 7,136	$ 5,496