Subsequent Events - Sale of Subsidiaries (Details)	9 Months Ended			0 Months Ended			0 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Dec. 31, 2011 USD ($)	Oct. 12, 2012 Subsequent Event [Member] Alcadon [Member] USD ($)	Sep. 30, 2012 Subsequent Event [Member] Alcadon [Member] USD ($)	Dec. 31, 2011 Subsequent Event [Member] Alcadon [Member] USD ($)	Oct. 16, 2012 Subsequent Event [Member] Interdata [Member] USD ($)	Oct. 16, 2012 Subsequent Event [Member] Interdata [Member] EUR (€)	Dec. 31, 2013 Subsequent Event [Member] Interdata [Member] USD ($)	Sep. 30, 2012 Subsequent Event [Member] Interdata [Member] USD ($)	Dec. 31, 2011 Subsequent Event [Member] Interdata [Member] USD ($)
Subsequent Event [Line Items]
Proceeds from divestiture of business				$ 6,500,000
Cash divested from deconsolidation				1,200,000
Discontinued operation, disposal of discontinued operation, purchase price				7,700,000			19,000,000	14,600,000
Transaction costs							800,000
Share purchase agreement, potential purchase price allocation, cash less negotiated liabilities				800,000
Payments of dividends	47,325,000	0		3,700,000
Representations and warranties agreement, term to obtain insurance policy							90 days	90 days
Representations and warranties agreement, cash threshold									20,000,000
Representations and warranties agreement, potential escrow deposit for cash threshold failure									1,500,000
Disposal Group, Including Discontinued Operation, Unclassified Balance Sheet Disclosures [Abstract]
Cash and cash equivalents					5,300,000	6,392,000				6,779,000	6,370,000
Time deposits					77,000	101,000
Accounts receivable, net					3,938,000	3,912,000				9,998,000	13,173,000
Inventories					4,792,000	5,169,000				2,491,000	1,554,000
Other current assets					383,000	409,000				1,632,000	1,115,000
Total current assets	0		24,810,000		14,490,000	15,983,000				20,900,000	22,212,000
Property and equipment, net					845,000	660,000				2,275,000	2,369,000
Goodwill					0	3,737,000				2,043,000	2,057,000
Other assets										258,000	260,000
Total assets					15,335,000	20,380,000				25,476,000	26,898,000
Accounts payable					1,828,000	1,988,000				4,084,000	4,191,000
Accrued liabilities					1,182,000	2,101,000				3,380,000	3,942,000
Other current liabilities					120,000	1,854,000				2,741,000	3,382,000
Non-current liabilities					865,000	599,000				378,000	380,000
Total liabilities					$ 3,995,000	$ 6,542,000				$ 10,583,000	$ 11,895,000