ACQUISITIONS (Details)	3 Months Ended		9 Months Ended					3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended					9 Months Ended			9 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 Acquisition-Date Fair Values [Member] USD ($)	Sep. 30, 2012 Measurement Period Adjustment [Member] USD ($)	Sep. 30, 2012 Acquisition-Date Fair Values (As Adjusted) [Member] USD ($)	Sep. 30, 2012 Class A [Member] USD ($)	Sep. 30, 2011 Class A [Member] USD ($)	Sep. 30, 2012 Class A [Member] USD ($)	Sep. 30, 2011 Class A [Member] USD ($)	Sep. 30, 2012 Class B [Member] USD ($)	Sep. 30, 2011 Class B [Member] USD ($)	Sep. 30, 2012 Class B [Member] USD ($)	Sep. 30, 2011 Class B [Member] USD ($)	Sep. 30, 2012 GigaCom Interconnect [Member]	Mar. 09, 2012 GigaCom Interconnect [Member] USD ($)	Mar. 09, 2012 GigaCom Interconnect [Member] GBP (£)	Sep. 30, 2012 Fibreco [Member] USD ($)	Jul. 31, 2012 Fibreco [Member] USD ($)	Jul. 31, 2012 Fibreco [Member] GBP (£)	Sep. 30, 2012 Powerbox Italy [Member] USD ($)	Sep. 12, 2012 Powerbox Italy [Member] USD ($)	Sep. 30, 2012 Powerbox Italy [Member] Class B [Member]	Sep. 30, 2012 Acquisitions [Member] USD ($)	Sep. 30, 2012 Acquisitions [Member] USD ($)
Acquired tax assets and liabilities [Line Items]
Acquisition date																Mar. 09, 2012			Jul. 31, 2012			Sep. 12, 2012
Acquisition of issued and outstanding capital stock (in hundredths)																	100.00%	100.00%		100.00%	100.00%		100.00%
Cash paid in exchange of net assets acquired					$ 22,138,000	$ 40,000	$ 22,178,000										$ 2,700,000	£ 1,700,000		$ 13,700,000	£ 8,700,000		$ 2,800,000
Cash Acquired from Acquisition			2,991,000	0															2,700,000			200,000
Number of restricted shares granted for acquisition (in shares)																								30,000
Restricted stock issued in connection with acquisition, fair value																							600,000
Acquisition-related costs	600,000		600,000
Assets acquired [Abstract]
Cash and cash equivalents					2,991,000	0	2,991,000
Accounts receivable					3,750,000	0	3,750,000
Inventories					1,061,000	0	1,061,000
Other current assets					90,000	0	90,000
Property, plant and equipment					502,000	0	502,000
Intangible assets					30,000	0	30,000
Total identifiable assets					8,424,000	0	8,424,000
Liabilities assumed [Abstract]
Accounts payable					(1,702,000)	0	(1,702,000)
Accrued expenses					(1,736,000)	0	(1,736,000)
Notes Payable					(216,000)	0	(216,000)
Income taxes payable					(264,000)	0	(264,000)
Deferred income tax liability, current					(70,000)	0	(70,000)
Other long-term liabilities					(216,000)	0	(216,000)
Total liabilities assumed					(4,204,000)	0	(4,204,000)
Net identifiable assets acquired					4,220,000	0	4,220,000
Goodwill	17,965,000	0	17,965,000	0	17,965,000	0	17,965,000
Fair value of net assets acquired	22,185,000	0	22,185,000	0	22,185,000	0	22,185,000
Consideration transferred [Abstract]
Cash Paid					22,138,000	40,000	22,178,000										2,700,000	1,700,000		13,700,000	8,700,000		2,800,000
Deferred consideration					47,000	(40,000)	7,000
Fair value of consideration transferred					22,185,000	0	22,185,000
Revenues contributed by acquisition																									900,000	1,000,000
Net earnings contributed by acquisition																									100,000	100,000
Unaudited Pro forma Consolidated Results of Operations
Revenue	77,497,000	77,846,000	222,161,000	232,707,000
Net earnings	$ 2,814,000	$ 1,213,000	$ 6,296,000	$ 4,457,000
Earnings per common share - basic and diluted (in dollars per share)								$ 0.22	$ 0.09	$ 0.49	$ 0.35	$ 0.24	$ 0.10	$ 0.54	$ 0.39