Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 90,370	$ 50,165
Restricted cash		200
Accounts receivable, net	$ 7,647	6,823
Inventory	5,470	6,425
Prepaid expenses and other assets	3,668	2,755
Total current assets	107,155	66,368
Restricted cash, non-current	192	192
Property and equipment, net	5,300	4,537
In-process research and development	2,209	2,399
Goodwill	46	50
Other intangible assets, net	300	273
Other assets	19	30
Total assets	115,221	73,849
Current liabilities:
Accounts payable	2,544	2,368
Accrued liabilities	5,843	7,070
Deferred income	2,720	1,993
Current portion of loans payable	125	137
Total current liabilities	11,232	11,568
Long-term portion of loans payable	385	454
Contingent purchase price consideration	1,219	1,218
Total liabilities	$ 12,836	$ 13,240
Commitments and contingencies (Note 2)
Shareholders’ equity:
Ordinary shares, £0.006705 nominal value; 36,183,293 shares authorized at June 30, 2015 and December 31, 2014, and 22,532,344 and 17,614,650 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	$ 242	$ 192
Additional paid-in capital	242,128	186,816
Accumulated deficit	(135,434)	(121,829)
Accumulated other comprehensive loss	(4,551)	(4,570)
Total shareholders’ equity	102,385	60,609
Total liabilities and shareholders’ equity	$ 115,221	$ 73,849