INCOME TAXES - Computation of Tax Expense Applying Federal Corporate Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Computed federal income taxes at the statutory rate (benefit)	$ (2,457)	$ (2,174)	$ (1,199)
State income taxes (net of federal benefit)	53	37	19
Permanent tax differences	(415)	(372)	(346)
Foreign tax rates and tax credits differing from USA	4	(60)	502
Net operating loss and other adjustment	216	0	0
Change in enacted tax rates applied to foreign deferred taxes	(38)	(114)	0
Change in valuation allowance	2,675	2,275	298
Total income tax provision (benefit)	$ 38	$ (408)	$ (726)