Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities
Net income	$ 15,375	$ 28,747	$ 301
Adjustments to reconcile net loss to net cash and cash equivalents provided by/(used in) operating activities:
Stock-based compensation	3,856	3,423	36
Deferred taxes	(1,877)	(14,459)	0
Depreciation and amortization	6,900	3,878	1,110
Loss on disposal of property and equipment	40	0	0
Non-cash interest relating to convertible notes and loan cost amortization	6,831	559	217
Non-cash compensation relating to business combination	0	0	4,418
Changes in operating assets and liabilities, net of those acquired in business combination:
Accounts receivable, net	(4,635)	(4,784)	(7,081)
Inventories, net	(5,869)	(3,468)	(708)
Prepaid expenses and other current assets	(314)	(558)	(188)
Accounts payable	(1,027)	225	(565)
Accrued compensation and related expenses	(160)	575	(2,854)
Current income taxes, net	(5,380)	4,233	20
Accrued Medicaid rebates	2,367	2,011	72
Accrued expenses, returned goods reserve and other	1,157	1,651	(67)
Net Cash and Cash Equivalents Provided by/(Used in) Continuing Operations	17,264	22,033	(5,289)
Net Cash Used in Discontinued Operation	0	0	(195)
Net Cash and Cash Equivalents Provided by/(Used in) Operating Activities	17,264	22,033	(5,484)
Cash Flows From Investing Activities
Cash acquired in business combination	0	0	18,198
Acquisition of product rights and other related assets	(30,500)	(34,634)	0
Release of restricted cash	0	0	2,260
Acquisition of property and equipment	(2,183)	(1,120)	(191)
Net Cash and Cash Equivalents (Used in)/Provided by Investing Activities	(32,683)	(35,754)	20,267
Cash Flows From Financing Activities
Net proceeds from equity offering	0	46,680	0
Net proceeds from convertible debt offering	0	138,243	0
Purchase of call option overlay, net	0	(15,623)	0
Repayment of line of credit, net	0	0	(4,065)
Proceeds from stock option exercises	819	819	0
Proceeds from warrant exercise	0	750	809
Excess tax benefit from share-based compensation awards	360	784	0
Treasury stock purchases	(113)	0	(433)
Net Cash and Cash Equivalents Provided by/(Used in) Financing Activities	1,066	171,653	(3,689)
Change in Cash and Cash Equivalents	(14,353)	157,932	11,094
Cash and cash equivalents, beginning of period	169,037	11,105	11
Cash and cash equivalents, end of period	154,684	169,037	11,105
Supplemental disclosure for cash flow information:
Cash paid for interest	4,205	0	250
Cash paid for income taxes, net	13,255	147	0
Supplemental non-cash investing and financing activities:
Property and equipment purchased and included in accounts payable	439	0	0
Issuance of common stock in connection with business combination	0	0	40,034
Cancellation of Series D, Series C, Series B, and Series A preferred stock	0	0	53,726
Acquired non-cash net assets	0	0	11,597
Preferred stock dividends accrued	$ 0	$ 0	$ 4,975