Note 7 (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Sep. 12, 2014
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	$ 73,000	$ 82,000
LCD Monitor [Member] | Reduction of Bad Debt Accrual [Member]
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	60,000
LCD Monitor [Member] | Reduction in General Accruals [Member]
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	23,000
LCD Monitor [Member] | Additional Union Pension Settlement Expense [Member]
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	(10,000)
LCD Monitor [Member]
Disposal Group, Including Discontinued Operation, Consideration			7,200,000
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	$ 73,000	$ 82,000