Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 184,282	$ 192,844
Accounts receivable, net	15,496	9,158
Other receivable	8,696	4,500
Inventory, net	9,800	7,767
Prepaid expenses and other assets	3,157	2,511
Total current assets	221,431	216,780
Restricted cash, non-current	100	100
Other receivable, non-current	1,079	4,500
Property and equipment, net	6,378	7,144
Operating lease right-of-use assets	6,662
Goodwill	2,483	2,483
Other intangible assets, net	43	61
Deferred tax asset	790	1,052
Total assets	238,966	232,120
Liabilities and shareholders' equity
Accounts payable	3,085	2,801
Accrued liabilities	8,718	10,891
Current portion of operating lease liability	533
Settlement liability	4,218	4,106
Deferred income	174	125
Current portion of loans payable		85
Total current liabilities	16,728	18,008
Long-term portion of operating lease liability	7,239
Long-term portion of loans payable	30	106
Total liabilities	23,997	18,114
Commitments and contingencies (Note 13)
Shareholders' equity:
Ordinary shares, £0.006705 nominal value; 40,060,729 and 38,978,604 shares authorized at September 30, 2019 and December 31, 2018, respectively, and 26,642,510 and 26,439,334 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	278	276
Additional paid-in capital	306,601	303,015
Accumulated deficit	(81,485)	(80,762)
Accumulated other comprehensive loss	(10,425)	(8,523)
Total shareholders' equity	214,969	214,006
Total liabilities and shareholders' equity	$ 238,966	$ 232,120