CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	[1]
Current assets:
Cash and cash equivalents	$ 150,221	$ 158,883
Accounts receivable, net	17,285	14,366
Inventories	4,096	2,784
Prepaid expenses and other receivables	1,530	1,185
Total current assets	173,132	177,218
Property, plant and equipment, net	4,300	3,262
Product acquisition costs, net	12,061	10,604
Debt issuance costs, net	4,762	5,132
Other	460	862
Total assets	194,715	197,078
Current liabilities:
Accounts payable	2,589	1,643
Accrued expenses	4,440	5,141
Payable for product acquisition costs	6,000	6,000
Other current liabilities	180	218
Total current liabilities	13,209	13,002
Convertible 3.75% senior notes, net of debt discount (face of $143,750)	103,544	100,311
Fair value of derivative liability - convertible 3.75% senior notes	0	41,400
Note payable, bank	3,160	3,160
Other long term liabilities	210	71
Total liabilities	120,123	157,944
Stockholders’ equity:
Common stock, $0.01 par value, 100,000,000 and 60,000,000 shares authorized; 52,862,453 and 52,819,787 shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	548	548
Additional paid-in capital	97,699	78,172
Accumulated deficit	(23,655)	(39,586)
Total stockholders' equity	74,592	39,134
Total liabilities and stockholders' equity	194,715	197,078
Series A Preferred Stock [Member]
Stockholders’ equity:
Convertible Preferred stock	0	0
Series C Preferred Stock [Member]
Stockholders’ equity:
Convertible Preferred stock	$ 0	$ 0

[1] Derived from the audited December 31, 2014 financial statements