Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net loss	$ (12,913)	$ (10,120)
Adjustments to reconcile net loss to net cash and cash equivalents used in operating activities:
Depreciation	565	265
Amortization of intangible assets	1,817	125
Amortization of debt discount and debt issuance costs	52	27
Stock-based compensation	1,428	899
Deferred tax (benefit) expense	(2,645)
Change in fair value of contingent consideration	856
Changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable		80
Interest receivable	(6)
Inventories	(1,735)
Other current and long term assets	(132)	143
Accounts payable	(1,391)	510
Accrued expenses	(765)	(143)
Net cash and cash equivalents used in operating activities	(14,869)	(8,214)
Investing Activities
Purchase of property and equipment	(153)	(155)
Net cash and cash equivalents used in investing activities	(153)	(155)
Financing Activities
Payment of debt	(1,219)
Proceeds from issuance of common stock, net of issuance costs	31,391	1,783
Taxes paid related to net share settlement of vesting of restricted stock units	(130)
Proceeds from exercise of stock options and warrants	8	196
Net cash and cash equivalents provided by financing activities	30,050	1,979
Effect of exchange rate changes on cash and cash equivalents	34
Net increase (decrease) in cash and cash equivalents	15,062	(6,390)
Cash and cash equivalents, beginning of period	38,449	34,766
Cash and cash equivalents, end of period	53,511	28,376
Supplemental Disclosure for Cash Flow Information
Interest paid	373	$ 187
Supplemental Schedule of Noncash Investing Activities
Transfer of inventory to property and equipment	$ 1,823