Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 155,567	$ 191,471
Accounts receivable, net	16,232	18,398
Inventories	23,137	26,388
Restricted cash	0	63
Prepaid expenses and other current assets	5,269	4,344
Total current assets	200,205	240,664
Property, plant and equipment, net	50,238	52,547
Goodwill	83,825	80,730
Intangible assets, net	30,319	31,833
Deferred Tax Assets, Net, Noncurrent	4,589	0
Other non-current assets	520	731
Total assets	369,696	406,505
Current liabilities:
Accounts payable	7,451	8,675
Accrued payroll and related expenses	8,086	9,627
Current portion of lease obligation	610	585
Current portion of contingent consideration	1,143	1,286
Deferred grant revenue	961	3,658
Other current liabilities	5,036	6,999
Total current liabilities	23,287	30,830
Long-term debt	141,643	143,297
Lease obligation, net of current portion	3,722	4,032
Contingent consideration—non-current	4,532	4,230
Deferred tax liability—non-current	55	1,970
Income taxes payable	985	910
Deferred rent	2,138	2,296
Other non-current liabilities	299	264
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $.001 par value per share; 5,000 shares authorized; none issued or outstanding at June 30, 2016 and December 31, 2015	0	0
Common stock, $.001 par value per share; 97,500 shares authorized; 32,388 and 33,323 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	32	33
Additional paid-in capital	194,769	209,121
Accumulated other comprehensive income	(33)	(31)
(Accumulated deficit) retained earnings	(1,733)	9,553
Total stockholders’ equity	193,035	218,676
Total liabilities and stockholders’ equity	$ 369,696	$ 406,505