Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Cash flows from operating activities:
Net loss	$ (11,637)	$ (7,179)	$ (12,155)
(Income) loss from discontinued operations, net of taxes	0	371	(2,383)
Loss from continuing operations	(11,637)	(6,808)	(14,538)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	1,845	2,062	2,051
Share-based compensation expense	1,504	1,119	932
Provision for doubtful accounts	(5)	40	42
Deferred income taxes	0	2,669	1,804
Loss (gain) on disposition of property and equipment	110	(1)	11
Gain on sale of Tecnonet	0	(189)	0
Changes in operating assets and liabilities:
Accounts and other receivables	548	2,649	186
Inventories	754	127	2,878
Other assets	(651)	2,002	(221)
Accounts payable	2,602	(1,420)	(1,035)
Accrued liabilities	(275)	(761)	(1,672)
Income tax payable	53	(39)	38
Deferred revenue	(1,819)	(745)	1,662
Other current and long term liabilities	(239)	(540)	(80)
Cash provided by (used in) operating activities - continuing operations	(7,210)	165	(7,942)
Cash provided by operating activities - discontinued operations	0	8,438	3,806
Net cash provided by (used in) operating activities	(7,210)	8,603	(4,136)
Cash flows from investing activities:
Purchases of property and equipment	(786)	(1,375)	(1,314)
Purchases of intangible assets	(163)	0	(650)
Decrease (increase) in restricted time deposits	4,919	(4,955)	13
Proceeds from sale of property and equipment	2	9	0
Proceeds from sale of Tecnonet, net of cash divested and transaction costs in 2015	4,789	8,688	0
Cash provided by (used in) investing activities - continuing operations	8,761	2,367	(1,951)
Cash used in investing activities - discontinued operations	0	(81)	(177)
Net cash provided by (used in) investing activities	8,761	2,286	(2,128)
Cash flows from financing activities:
Proceeds from exercise of stock options	145	190	72
Payments for shares repurchased for tax withholdings on vesting of restricted stock awards	(100)	(50)	(87)
Purchase of treasury shares	(2,743)	(4,943)	0
Cash used in financing activities - continuing operations	(2,698)	(4,803)	(15)
Cash provided by (used in) financing activities - discontinued operations	0	(1,649)	1,795
Net cash provided by (used in) financing activities	(2,698)	(6,452)	1,780
Effect of exchange rate changes on cash and cash equivalents	94	(690)	(685)
Net increase (decrease) in cash and cash equivalents	(1,053)	3,747	(5,169)
Cash and cash equivalents, beginning of year	26,169	22,422	27,591
Cash and cash equivalents, end of year	25,116	26,169	22,422
Less cash and equivalents of discontinued operations, end of year	0	0	6,280
Cash and cash equivalents, end of year	25,116	26,169	16,142
Supplemental disclosure of cash flow information:
Cash paid during year for interest	0	125	283
Cash paid during year for income taxes	$ 155	$ 1,825	$ 1,791