Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 200,895	$ 8,388
Accounts receivable, net	34,466	29,928
Inventories	24,763	27,639
Deferred tax asset—current	8,316	8,362
Restricted cash	3,127	969
Prepaid expenses and other current assets	3,554	3,333
Total current assets	275,121	78,619
Property, plant and equipment, net	49,226	48,057
Goodwill	80,748	80,763
Intangible assets, net	41,890	62,262
Other non-current assets	4,565	1,784
Total assets	451,550	271,485
Current liabilities:
Accounts payable	12,421	6,950
Accrued payroll and related expenses	8,349	7,485
Current portion of lease obligation	509	441
Current portion of contingent consideration	733	1,493
Deferred grant revenue	6,330	2,029
Other current liabilities	8,043	5,611
Total current liabilities	36,385	24,009
Long-term debt	142,097	0
Lease obligation, net of current portion	4,617	5,126
Contingent consideration—non-current	5,023	7,315
Deferred tax liability—non-current	14,890	6,318
Income taxes payable	806	2,118
Deferred rent	2,228	1,746
Other non-current liabilities	493	1,074
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, 2014 and 2013	0	0
Common stock, $.001 par value per share; 50,000 shares authorized; 34,433 and 34,073 shares issued and outstanding at December 31, 2014 and 2013, respectively	34	34
Additional paid-in capital	229,374	201,021
Accumulated other comprehensive (loss) income	(29)	18
Retained earnings	15,632	22,706
Total stockholders’ equity	245,011	223,779
Total liabilities and stockholders’ equity	$ 451,550	$ 271,485