Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net loss	$ (3,138)	$ (5,919)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	758	1,015
Share-based compensation expense	804	697
Reduction in provision for doubtful accounts	(94)	(17)
Changes in operating assets and liabilities:
Accounts receivables	(2,532)	(1,073)
Inventories	298	1,872
Other assets	477	371
Accounts payable	937	207
Accrued liabilities	824	(319)
Deferred revenue	1,075	(879)
Other liabilities	4,949	170
Net cash provided by (used in) operating activities	4,358	(3,875)
Cash flows from investing activities:
Purchases of property and equipment	(440)	(435)
Proceeds from sale of Tecnonet	0	4,789
(Increase) release of restricted cash and time deposits	(4,646)	22
Net cash provided by (used in) investing activities	(5,086)	4,376
Cash flows from financing activities:
Proceeds from exercise of stock options	3	116
Purchase of treasury shares	0	(1,871)
Shares repurchased for tax withholdings on vesting of restricted stock awards	(64)	(112)
Net cash used in financing activities	(61)	(1,867)
Effect of exchange rate changes on cash and cash equivalents	6	7
Net decrease in cash and cash equivalents	(783)	(1,359)
Cash and cash equivalents, beginning of period	25,116	26,169
Cash and cash equivalents, end of period	24,333	24,810
Supplemental disclosure of cash flow information:
Cash paid during period for interest	0	0
Cash paid during period for income taxes	$ 87	$ 104