Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income	$ (29,218)	$ 49,602
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation	3,262	4,618
Depreciation and amortization	694	814
Amortization of debt issuance costs and non-cash interest charges	677	481
Accrued income taxes	0	6,521
Gain on sale of business	0	89,053
Change in fair value of warrant liabilities	(5,504)	564
Change in fair value of contingent purchase consideration	2,600	(1,600)
Changes in operating assets and liabilities:
Trade accounts receivable	(712)	2,559
Inventory	186	542
Prepaid expenses and other current assets	(2,138)	(3,493)
Other assets	(1,172)	860
Accounts payable and accrued expenses	(3,860)	(9,876)
Deferred rent	(51)	0
Deferred revenue	(1,193)	(5,413)
Net cash used by operating activities	(36,429)	(42,874)
Investing activities:
Purchases of property and equipment	(99)	(68)
Proceeds from sale of business	0	80,926
Change in restricted cash from sale of business	(10,002)	1,500
Net cash provided by investing activities	9,903	79,358
Financing activities:
Proceeds of long-term debt	2,167	0
Repayment of revolving credit facility	0	(1,450)
Principal payments on long-term debt	(3,334)	0
Proceeds from exercise of common stock options and warrants	6	7
Proceeds from issuance of common stock, net	135	126
Net cash provided by (used in) financing activities	(1,026)	(1,317)
Net increase (decrease) in cash and cash equivalents	(27,552)	35,167
Cash and cash equivalents at beginning of period	155,349	42,205
Cash and cash equivalents at end of period	127,797	77,372
Noncash investing and financing activities:
Deferred financing charges in accounts payable	$ 0	$ 294