Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash	$ 18,559	$ 21,749
Accounts receivable	31	116
Inventory, net	494	430
Prepaid expenses and other current assets	218	242
Total current assets	19,302	22,537
Property and equipment, net	743	775
Intangible asset	28	32
Other assets	61	63
Total assets	20,134	23,407
Current liabilities
Accounts payable	667	736
Due to related parties	26	55
Other current liabilities	748	569
Total current liabilities	1,441	1,360
Deferred rent	17	22
Total liabilities	$ 1,458	$ 1,382
Commitments and contingencies (note 10)
Shareholders' equity (deficit)
Common Ordinary Shares	$ 13	$ 13
Deferred Ordinary shares	54	54
Additional paid-in capital	77,921	77,505
Accumulated deficit	(59,312)	(55,547)
Total shareholders' equity	18,676	22,025
Total liabilities and shareholders’ equity	$ 20,134	$ 23,407