Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities
Net loss	$ (30,127)	$ (93,044)
Adjustments to reconcile net loss to net cash and cash equivalents used in operating activities:
Depreciation	1,142	1,052
Amortization of intangible assets	3,323	3,603
Amortization of debt discount and debt issuance costs	43	99
Stock-based compensation	3,679	2,477
Inventory write-down related to restructuring		2,565
Non-cash restructuring and other charges		2,551
Goodwill impairment		61,784
Deferred tax benefit	(1,580)	(3,657)
Loss on extinguishment of debt	308
Change in fair value of warrant liabilities	2,326
Change in fair value of contingent consideration	453	1,800
Changes in operating assets and liabilities:
Accounts receivable	(487)
Interest receivable	39	(13)
Inventories	(862)	(3,983)
Other current and long term assets	(1,473)	(213)
Accounts payable	(1,909)	(2,497)
Accrued expenses	(390)	(60)
Net cash and cash equivalents used in operating activities	(25,515)	(27,536)
Investing Activities
Purchase of property and equipment	(1,397)	(517)
Purchase of intellectual property	(398)
Net cash and cash equivalents used in investing activities	(1,795)	(517)
Financing Activities
Payment of debt	(13,343)	(3,078)
Proceeds from issuance of debt and warrants	13,196
Proceeds from issuance of common stock and warrants, net of issuance costs	29,193	57,637
Taxes paid related to net share settlement of vesting of restricted stock units	(168)	(130)
Proceeds from exercise of stock options and warrants		165
Net cash and cash equivalents provided by financing activities	28,878	54,594
Effect of exchange rate changes on cash and cash equivalents	2	(92)
Net increase in cash, cash equivalents and restricted cash	1,570	26,449
Cash, cash equivalents and restricted cash, beginning of period	34,590	38,449
Cash, cash equivalents and restricted cash, end of period	36,160	64,898
Supplemental Disclosure for Cash Flow Information
Interest paid	368	713
Supplemental Schedule of Noncash Investing Activities
Transfer of inventory to property and equipment		$ 1,823
Issuance of common stock as contingent consideration	5,227
Relative fair value of warrants issued with debt	$ 300