Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (6,027,000)	$ (1,496,000)
Less: Net loss from discontinued operations, net of tax	(817,000)
Net loss from continuing operations	(5,210,000)	(1,496,000)
Adjustments to reconcile net loss from continuing operations to net cash used in operating activities:
Depreciation and amortization expense	466,000	470,000
Provision for inventory	355,000
Non-cash rent expense	48,000	59,000
Non-cash interest	(16,000)
Share-based compensation expense	957,000	845,000
Deferred income taxes	(87,000)	(279,000)
Changes in operating assets and liabilities:
Accounts receivable, net	(94,000)	(900,000)
Inventory, net	(753,000)	(2,021,000)
Prepaid expenses and other assets	(469,000)	(1,717,000)
Accounts payable	1,814,000	142,000
Accrued liabilities	(2,568,000)	(762,000)
Deferred income	25,000	85,000
Net cash used in operating activities from continuing operations	(5,532,000)	(5,574,000)
Cash flows from investing activities
Purchases of property and equipment	(605,000)	(142,000)
Net cash used in investing activities from continuing operations	(605,000)	(142,000)
Cash flows from financing activities
Proceeds from exercise of share options	1,000	1,799,000
Payments of tax withheld on exercises of options and vesting of restricted share units	(155,000)	(145,000)
Repurchases of ordinary shares	(7,732,000)
Net cash provided by (used in) financing activities from continuing operations	(7,886,000)	1,654,000
Net cash flows of continuing operations	(14,023,000)	(4,062,000)
Cash flows from discontinued operations
Net operating cash flows provided by discontinued operations	147,000
Net investing cash flows used in discontinued operations
Net financing cash flows used in discontinued operations
Net cash flows of discontinued operations	147,000
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(909,000)	736,000
Net decrease in cash, cash equivalents, and restricted cash	(14,785,000)	(3,326,000)
Cash, cash equivalents, and restricted cash at beginning of period	181,370,000	192,944,000
Cash, cash equivalents, and restricted cash at end of period	$ 166,585,000	$ 189,618,000