CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 6,555		$ 167
Reconciliation of net income to net cash (used in) provided by operating activities
Depreciation and amortization of fixed assets	118		93
Amortization of license fee	25		25
Stock based compensation	378		259
Amortization of debt issuance costs	195		8
Amortization of product acquisition costs	30		30
Provision for write down of inventory	0		14
Amortization of debt discount on convertible 3.75% senior notes	1,590		0
Change in the fair value of derivative liability	(8,625)		0
Changes in operating assets and liabilities
Accounts receivable	(1,939)		827
Inventories	(938)		194
Prepaid expenses and other assets	(148)		(50)
Accounts payable and accrued expenses	2,705		(1,095)
Deferred income	(60)		(409)
Net cash (used in) provided by operating activities	(114)		63
Cash flows from investing activities:
Product acquisition costs	(1,500)		0
Capital expenditures	(211)		(68)
Net cash used in investing activities	(1,711)		(68)
Cash flows from financing activities:
Proceeds from exercise of common stock options and warrants	15		327
Principal payments on capital lease obligations	(33)		(6)
Debt issuance costs	(9)
Costs related to stock issuance	0		(3)
Net cash (used in) provided by financing activities	(27)		318
Net (decrease) increase in cash and cash equivalents	(1,852)		313
Cash and cash equivalents at beginning of period	158,883	[1]	2,101
Cash and cash equivalents at end of period	157,031		2,414
Supplemental Cash flow information:
Cash payments for interest	49		54
Cash payments for income taxes	45		7
Non cash investing and financing transactions:
Issuance of restricted stock	$ 347		$ 0

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