INCOME TAXES - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Deferred Revenue	$ 277	$ 353
Inventory capitalization	109	147
Inventory reserves	141	112
Accrued expenses	804	917
Disallowed Interest Expense	123	0
Net operating loss	0	1,506
Net operating loss(1)	9,293	6,549
Non-cash accounting charges related to stock options and warrants	584	464
Foreign tax credit carryover	3,621	5,544
Other	876	365
Total deferred tax assets	15,828	15,957
Valuation allowance	(12,793)	(11,436)
Total deferred tax assets, net of valuation allowance	3,035	4,521
Deferred tax liabilities:
Prepaid expenses	262	239
Deferred commissions	255	543
Internally-developed software	326	381
Fixed assets	267	266
Total deferred tax liabilities	1,110	1,429
Total net deferred tax assets	1,925	3,092
AUSTRALIA
Deferred tax assets:
Valuation allowance	(300)	0
Operating Loss Carryforwards [Line Items]
Gross NOL	597
Tax Effected NOL	179
BERMUDA
Operating Loss Carryforwards [Line Items]
Gross NOL	32
Tax Effected NOL	0
Canada
Operating Loss Carryforwards [Line Items]
Gross NOL	40
Tax Effected NOL	10
CHINA
Deferred tax assets:
Valuation allowance	(300)	0
Operating Loss Carryforwards [Line Items]
Gross NOL	278
Tax Effected NOL	70
China
Deferred tax assets:
Valuation allowance	(600)	(600)
Operating Loss Carryforwards [Line Items]
Gross NOL	1,857
Tax Effected NOL	613
Gibraltar
Operating Loss Carryforwards [Line Items]
Gross NOL	116
Tax Effected NOL	0
Hong Kong
Deferred tax assets:
Valuation allowance	(100)	0
Operating Loss Carryforwards [Line Items]
Gross NOL	323
Tax Effected NOL	53
Japan
Operating Loss Carryforwards [Line Items]
Gross NOL	203
Tax Effected NOL	70
Mexico
Deferred tax assets:
Valuation allowance	(3,100)	(2,800)
Operating Loss Carryforwards [Line Items]
Gross NOL	10,195
Tax Effected NOL	3,059
Norway
Deferred tax assets:
Valuation allowance	(100)	0
Operating Loss Carryforwards [Line Items]
Gross NOL	287
Tax Effected NOL	66
Russia
Operating Loss Carryforwards [Line Items]
Gross NOL	43
Tax Effected NOL	9
Singapore
Operating Loss Carryforwards [Line Items]
Gross NOL	127
Tax Effected NOL	22
Norway
Deferred tax assets:
Valuation allowance	(200)	(100)
Operating Loss Carryforwards [Line Items]
Gross NOL	687
Tax Effected NOL	192
Sweden
Deferred tax assets:
Valuation allowance	(100)	(100)
Operating Loss Carryforwards [Line Items]
Gross NOL	490
Tax Effected NOL	108
Switzerland
Operating Loss Carryforwards [Line Items]
Gross NOL	9,249
Tax Effected NOL	850
Taiwan
Deferred tax assets:
Valuation allowance	(900)	(800)
Operating Loss Carryforwards [Line Items]
Gross NOL	4,901
Tax Effected NOL	980
Ukraine
Deferred tax assets:
Valuation allowance	(100)	(100)
Operating Loss Carryforwards [Line Items]
Gross NOL	568
Tax Effected NOL	102
United States
Deferred tax assets:
Valuation allowance	(6,900)	(6,800)
Operating Loss Carryforwards [Line Items]
Gross NOL	9,091
Tax Effected NOL	1,878
United States - Federal
Deferred tax assets:
Valuation allowance	(100)	$ (100)
Operating Loss Carryforwards [Line Items]
Gross NOL	415
Tax Effected NOL	$ 79