Discontinued Operations - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended	11 Months Ended	12 Months Ended	0 Months Ended
	Feb. 28, 2014	Aug. 30, 2013 Aydin Displays Inc	Aug. 30, 2014 Aydin Displays Inc Scenario, Forecast	Jan. 16, 2014 Z-Axis Inc	Jan. 16, 2014 Z-Axis Inc	Feb. 28, 2014 Lexel Imaging, Inc.	Mar. 26, 2014 Lexel Imaging, Inc. Subsequent Event
Schedule Of Sale And Divestiture Of Business [Line Items]
Combination of cash and additional earn-out potential payments		$ 6,000,000
Divestiture of business	23,690,000	15,000,000		9,000,000			3,900,000
Gain on sale of subsidiary		2,900,000
Rental income		600,000
Rental income recognition period		5 years
Amount of hold back provisions held in escrow account		1,200,000
Amount of net sales from discontinued operations			8,300,000		7,800,000	7,600,000
Amount of pre-tax net income from discontinued operations			500,000		600,000	(800,000)
Notes payable in connection with the sale of subsidiary				1,000,000	1,000,000
Gain (loss) on sale of business				5,400,000			(4,400,000)
Value of inventories guaranteed to purchase						2,900,000	2,900,000
Purchase commitment period						5 years	5 years
Collection period for receivable from divestiture of business							180 days
Amount of cash receivable from divestiture of business							$ 1,000,000