Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 169,508	$ 191,471
Accounts receivable, net	24,990	18,398
Inventories	26,045	26,388
Restricted cash	0	63
Prepaid expenses and other current assets	4,851	4,344
Total current assets	225,394	240,664
Property, plant and equipment, net	50,858	52,547
Goodwill	83,834	80,730
Intangible assets, net	27,639	31,833
Other non-current assets	525	731
Total assets	388,250	406,505
Current liabilities:
Accounts payable	16,047	8,675
Accrued payroll and related expenses	9,642	9,627
Current portion of lease obligation	98	585
Current portion of contingent consideration	2,826	1,286
Deferred grant revenue	0	3,658
Other current liabilities	4,999	6,999
Total current liabilities	33,612	30,830
Long-term debt	144,340	143,297
Lease obligation, net of current portion	3,979	4,032
Contingent consideration—non-current	2,349	4,230
Deferred tax liability—non-current	58	1,970
Income taxes payable	1,045	910
Deferred rent	1,965	2,296
Other non-current liabilities	272	264
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $.001 par value per share; 5,000 shares authorized; none issued or outstanding at December 31, 2016 and 2015	0	0
Common stock, $.001 par value per share; 97,500 shares authorized; 32,897 and 33,323 shares issued and outstanding at December 31, 2016 and 2015, respectively	33	33
Additional paid-in capital	204,905	209,121
Accumulated other comprehensive loss	(53)	(31)
(Accumulated deficit) retained earnings	(4,255)	9,553
Total stockholders’ equity	200,630	218,676
Total liabilities and stockholders’ equity	$ 388,250	$ 406,505