SEGMENT REPORTING - Revenue By Country (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015
Revenue, Major Customer [Line Items]
Revenues	$ 23,140	$ 22,872	[1]	$ 43,802	$ 39,509	[1]
Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 23,140	$ 22,872		$ 43,802	$ 39,509
Concentration risk, percentage	100.00%	100.00%		100.00%	100.00%
UNITED STATES | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 11,286	$ 12,874		$ 21,854	$ 20,756
Concentration risk, percentage	49.00%	56.00%		50.00%	53.00%
UNITED KINGDOM | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 4,843	$ 4,815		$ 9,448	$ 10,743
Concentration risk, percentage	21.00%	21.00%		22.00%	27.00%
All Others | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 7,011	$ 5,183		$ 12,500	$ 8,010
Concentration risk, percentage	30.00%	23.00%		28.00%	20.00%

[1] See note 1, Nature of operations - Revisions, for explanation of change to 2015 revenue amounts.