Discontinued Operations - Summary of Operating Results of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Recovery on assets held for sale	$ 0	[1]	$ 37	[1]	$ 0	[1]	$ 212	[1]
Operating pre-tax loss	(6)		83		(63)		(391)
Gain on sale of discontinued operations	0	[2]	0	[2]	0	[2]	743	[2]
Pre-tax (loss) income	(6)		83		(63)		352
Provision for income taxes	0		13		0		(236)
Net (loss) income from discontinued operations	$ (6)		$ 96		$ (63)		$ 116

[1] Relates to recoveries on equipment that was previously written down in connection with the sale of our PPDS Technology to Mati.

[2] Relates to the 2013 revenue recognition of funds received from Mati at the end of 2012, which were initially recorded as deferred income, for the 90-day option to acquire assets related to our former PPDS Technology.