UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 102,174	$ 9,774
Marketable securities	136,380	54,384
Accounts receivable	5,692	8,281
Inventories	0	3,570
Research and development tax credit receivable	0	2,107
Prepaid expenses and other current assets	32,773	4,264
Total current assets	277,019	82,380
Property and equipment, net	407	544
Operating lease right-of-use assets	3,117	3,612
Goodwill	16,836	18,491
Intangible assets, net	0	813
Research and development tax credit receivable	6,407	6,322
Other non-current assets	37,615	39,274
Total assets	341,401	151,436
Current liabilities:
Current portion of long-term contingent consideration payable	1,914	5,554
Current portion of operating lease liability	563	645
Accounts payable	4,879	6,100
Accrued expenses	15,820	19,810
Income taxes	354	43
Other current liabilities	3,488	3,832
Total current liabilities	27,018	35,984
Long-term debt	124,879	121,686
Long-term contingent consideration payable, less current portion	0	11,773
Long-term operating lease liability	2,087	2,319
Other non-current liabilities	5,292	8,873
Total liabilities	159,276	180,635
Shareholders’ equity (deficit):
Preferred shares, nominal value of $0.01 per share; 50,000 shares authorized; 488 issued and outstanding at June 30, 2020 and none issued and outstanding at December 31, 2019, respectively	5	0
Ordinary shares, nominal value of $0.01 per share; 500,000 shares authorized; 63,536 issued and 58,129 outstanding at June 30, 2020 and 42,927 issued and 37,520 outstanding at December 31, 2019	635	429
Treasury shares, at cost, 5,407 shares held at June 30, 2020 and December 31, 2019, respectively	(49,998)	(49,998)
Additional paid-in capital	615,207	434,391
Accumulated deficit	(361,206)	(391,215)
Accumulated other comprehensive loss	(22,518)	(22,806)
Total shareholders’ equity (deficit)	182,125	(29,199)
Total liabilities and shareholders’ equity (deficit)	$ 341,401	$ 151,436