UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 73,506	$ 9,774
Marketable securities	39,977	54,384
Accounts receivable	8,797	8,281
Inventories	3,523	3,570
Research and development tax credit receivable	1,835	2,107
Prepaid expenses and other current assets	3,337	4,264
Total current assets	130,975	82,380
Property and equipment, net	472	544
Operating lease right-of-use assets	3,365	3,612
Goodwill	18,491	18,491
Intangible assets, net	610	813
Research and development tax credit receivable	6,288	6,322
Other non-current assets	47,524	39,274
Total assets	207,725	151,436
Current liabilities:
Current portion of long-term contingent consideration payable	5,855	5,554
Current portion of operating lease liability	604	645
Accounts payable	6,790	6,100
Accrued expenses	14,858	19,810
Income taxes	2,297	43
Other current liabilities	1,932	3,832
Total current liabilities	32,336	35,984
Long-term debt	123,258	121,686
Long-term contingent consideration payable, less current portion	12,195	11,773
Long-term operating lease liability	2,205	2,319
Other non-current liabilities	5,664	8,873
Total liabilities	175,658	180,635
Shareholders’ equity (deficit):
Preferred shares, nominal value of $0.01 per share; 50,000 shares authorized; 488 issued and outstanding at March 31, 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; 51,812 issued and 46,404 outstanding at March 31, 2020 and 42,927 issued and 37,520 outstanding at December 31, 2019	518	429
Treasury shares, at cost, 5,407 shares held at March 31, 2020 and December 31, 2019, respectively	(49,998)	(49,998)
Additional paid-in capital	497,249	434,391
Accumulated deficit	(392,080)	(391,215)
Accumulated other comprehensive loss	(23,627)	(22,806)
Total shareholders’ equity (deficit)	32,067	(29,199)
Total liabilities and shareholders’ equity (deficit)	$ 207,725	$ 151,436