Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended	0 Months Ended	12 Months Ended		0 Months Ended	6 Months Ended	0 Months Ended	11 Months Ended
	May 31, 2014	Mar. 26, 2014 Lexel Imaging, Inc.	Feb. 28, 2014 Lexel Imaging, Inc.	Mar. 26, 2014 Lexel Imaging, Inc.	Aug. 30, 2013 Aydin Displays Inc	Aug. 30, 2013 Aydin Displays Inc	Jan. 16, 2014 Z-Axis Inc	Jan. 16, 2014 Z-Axis Inc
Schedule Of Sale And Divestiture Of Business [Line Items]
Combination of cash and additional earn-out potential payments						$ 6,000,000
Divestiture of business	100,000	3,900,000			15,000,000		9,000,000
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			7,600,000			8,300,000		7,800,000
Amount of pre-tax net income from discontinued operations			(800,000)			500,000		600,000
Notes payable in connection with the sale of subsidiary								1,000,000
Gain (loss) on sale of business		(4,400,000)					5,400,000
Value of inventories guaranteed to purchase				2,900,000
Purchase commitment period		5 years
Collection period for receivable from divestiture of business		180 days
Amount of cash receivable from divestiture of business				$ 1,000,000